Package org.codehaus.groovy.runtime

# Class DefaultGroovyMethods

java.lang.Object
org.codehaus.groovy.runtime.DefaultGroovyMethodsSupport
org.codehaus.groovy.runtime.DefaultGroovyMethods

public class DefaultGroovyMethods extends DefaultGroovyMethodsSupport
This class defines new groovy methods which appear on normal JDK classes inside the Groovy environment. Static methods are used with the first parameter being the destination class, i.e. `public static String reverse(String self)` provides a `reverse()` method for `String`.

NOTE: While this class contains many 'public' static methods, it is primarily regarded as an internal class (its internal package name suggests this also). We value backwards compatibility of these methods when used within Groovy but value less backwards compatibility at the Java method call level. I.e. future versions of Groovy may remove or move a method call in this file but would normally aim to keep the method available from within Groovy.

- ## Field Summary

  Fields
  Modifier and Type
  Field
  Description
  `static final Class[]`
  `ADDITIONAL_CLASSES`
  `static final Class[]`
  `DGM_LIKE_CLASSES`

- ## Constructor Summary

  Constructors
  Constructor
  Description
  `DefaultGroovyMethods()`

- ## Method Summary

  Modifier and Type
  Method
  Description
  `static double`
  `abs(Double number)`
  Get the absolute value
  `static float`
  `abs(Float number)`
  Get the absolute value
  `static long`
  `abs(Long number)`
  Get the absolute value
  `static int`
  `abs(Number number)`
  Get the absolute value
  `static <T> boolean`
  `addAll(Collection<T> self, Iterable<? extends T> items)`
  Adds all items from the iterable to the Collection.
  `static <T> boolean`
  `addAll(Collection<T> self, Iterator<? extends T> items)`
  Adds all items from the iterator to the Collection.
  `static <T> boolean`
  `addAll(Collection<T> self, T[] items)`
  Modifies the collection by adding all the elements in the specified array to the collection.
  `static <T> boolean`
  `addAll(List<T> self, int index, T[] items)`
  Modifies this list by inserting all the elements in the specified array into the list at the specified position.
  `static void`
  `addShutdownHook(Object self, Closure closure)`
  Allows the usage of addShutdownHook without getting the runtime first.
  `static Boolean`
  `and(Boolean left, Boolean right)`
  Logical conjunction of two boolean operators.
  `static Number`
  `and(Number left, Number right)`
  Bitwise AND together two Numbers.
  `static BitSet`
  `and(BitSet left, BitSet right)`
  Bitwise AND together two BitSets.
  `static <T> boolean`
  `any(Iterable<T> self, Closure predicate)`
  Iterates over the contents of an iterable, and checks whether a predicate is valid for at least one element.
  `static boolean`
  `any(Object self)`
  Iterates over the elements of a collection, and checks whether at least one element is true according to the Groovy Truth.
  `static boolean`
  `any(Object self, Closure predicate)`
  Iterates over the contents of an object or collection, and checks whether a predicate is valid for at least one element.
  `static <T> boolean`
  `any(Iterator<T> self, Closure predicate)`
  Iterates over the contents of an iterator, and checks whether a predicate is valid for at least one element.
  `static <K, V> boolean`
  `any(Map<K,V> self, Closure<?> predicate)`
  Iterates over the entries of a map, and checks whether a predicate is valid for at least one entry.
  `static <T> boolean`
  `any(T[] self, Closure predicate)`
  Iterates over the contents of an Array, and checks whether a predicate is valid for at least one element.
  `static boolean`
  `asBoolean(boolean[] array)`
  Coerces a boolean array to a boolean value.
  `static boolean`
  `asBoolean(byte[] array)`
  Coerces a byte array to a boolean value.
  `static boolean`
  `asBoolean(char[] array)`
  Coerces a char array to a boolean value.
  `static boolean`
  `asBoolean(double[] array)`
  Coerces a double array to a boolean value.
  `static boolean`
  `asBoolean(float[] array)`
  Coerces a float array to a boolean value.
  `static boolean`
  `asBoolean(int[] array)`
  Coerces an int array to a boolean value.
  `static boolean`
  `asBoolean(long[] array)`
  Coerces a long array to a boolean value.
  `static boolean`
  `asBoolean(short[] array)`
  Coerces a short array to a boolean value.
  `static boolean`
  `asBoolean(Boolean bool)`
  Coerce a Boolean instance to a boolean value.
  `static boolean`
  `asBoolean(Character character)`
  Coerce a character to a boolean value.
  `static boolean`
  `asBoolean(Double object)`
  Coerce a Double instance to a boolean value.
  `static boolean`
  `asBoolean(Float object)`
  Coerce a Float instance to a boolean value.
  `static boolean`
  `asBoolean(Number number)`
  Coerce a number to a boolean value.
  `static boolean`
  `asBoolean(Object object)`
  Coerce an object instance to a boolean value.
  `static boolean`
  `asBoolean(Object[] array)`
  Coerce an Object array to a boolean value.
  `static boolean`
  `asBoolean(Collection collection)`
  Coerce a collection instance to a boolean value.
  `static boolean`
  `asBoolean(Enumeration enumeration)`
  Coerce an enumeration instance to a boolean value.
  `static boolean`
  `asBoolean(Iterator iterator)`
  Coerce an iterator instance to a boolean value.
  `static boolean`
  `asBoolean(Map map)`
  Coerce a map instance to a boolean value.
  `static <T> Collection<T>`
  `asCollection(Iterable<T> self)`
  Converts this Iterable to a Collection.
  `static <T> Collection<T>`
  `asImmutable(Collection<T> self)`
  A convenience method for creating an immutable Collection.
  `static <T> List<T>`
  `asImmutable(List<T> self)`
  A convenience method for creating an immutable List.
  `static <K, V> Map<K,V>`
  `asImmutable(Map<K,V> self)`
  A convenience method for creating an immutable Map.
  `static <T> Set<T>`
  `asImmutable(Set<T> self)`
  A convenience method for creating an immutable Set.
  `static <K, V> SortedMap<K,V>`
  `asImmutable(SortedMap<K,V> self)`
  A convenience method for creating an immutable SortedMap.
  `static <T> SortedSet<T>`
  `asImmutable(SortedSet<T> self)`
  A convenience method for creating an immutable SortedSet.
  `static <T> List<T>`
  `asList(Iterable<T> self)`
  Converts this Iterable to a List.
  `static <T> List<T>`
  `asReversed(List<T> self)`
  Creates a view list with reversed order, and the order of original list will not change.
  `static <T> NavigableSet<T>`
  `asReversed(NavigableSet<T> self)`
  Creates a reverse order view of the set.
  `static String`
  `asString(Throwable self)`
  Get the detail information of `Throwable` instance's stack trace
  `static <T> Collection<T>`
  `asSynchronized(Collection<T> self)`
  A convenience method for creating a synchronized Collection.
  `static <T> List<T>`
  `asSynchronized(List<T> self)`
  A convenience method for creating a synchronized List.
  `static <K, V> Map<K,V>`
  `asSynchronized(Map<K,V> self)`
  A convenience method for creating a synchronized Map.
  `static <T> Set<T>`
  `asSynchronized(Set<T> self)`
  A convenience method for creating a synchronized Set.
  `static <K, V> SortedMap<K,V>`
  `asSynchronized(SortedMap<K,V> self)`
  A convenience method for creating a synchronized SortedMap.
  `static <T> SortedSet<T>`
  `asSynchronized(SortedSet<T> self)`
  A convenience method for creating a synchronized SortedSet.
  `static <T> T`
  `asType(Closure impl, Class<T> type)`
  Coerces the closure to an implementation of the given class.
  `static <T> T`
  `asType(Iterable iterable, Class<T> clazz)`
  Converts the given iterable to another type.
  `static <T> T`
  `asType(Number self, Class<T> c)`
  Transform this number to the given type, using the 'as' operator.
  `static <T> T`
  `asType(Object[] ary, Class<T> clazz)`
  Converts the given array to either a List, Set, or SortedSet.
  `static <T> T`
  `asType(Object obj, Class<T> type)`
  Converts a given object to a type.
  `static <T> T`
  `asType(Collection col, Class<T> clazz)`
  Converts the given collection to another type.
  `static <T> T`
  `asType(Map map, Class<T> clazz)`
  Coerces this map to the given type, using the map's keys as the public method names, and values as the implementation.
  `static <T> Collection<T>`
  `asUnmodifiable(Collection<T> self)`
  Creates an unmodifiable view of a Collection.
  `static <T> List<T>`
  `asUnmodifiable(List<T> self)`
  Creates an unmodifiable view of a List.
  `static <K, V> Map<K,V>`
  `asUnmodifiable(Map<K,V> self)`
  Creates an unmodifiable view of a Map.
  `static <T> Set<T>`
  `asUnmodifiable(Set<T> self)`
  Creates an unmodifiable view of a Set.
  `static <K, V> SortedMap<K,V>`
  `asUnmodifiable(SortedMap<K,V> self)`
  Creates an unmodifiable view of a SortedMap.
  `static <T> SortedSet<T>`
  `asUnmodifiable(SortedSet<T> self)`
  Creates an unmodifiable view of a SortedSet.
  `static BigDecimal`
  `average(byte[] self)`
  Calculates the average of the bytes in the array.
  `static double`
  `average(double[] self)`
  Calculates the average of the doubles in the array.
  `static double`
  `average(float[] self)`
  Calculates the average of the floats in the array.
  `static BigDecimal`
  `average(int[] self)`
  Calculates the average of the ints in the array.
  `static BigDecimal`
  `average(long[] self)`
  Calculates the average of the longs in the array.
  `static BigDecimal`
  `average(short[] self)`
  Calculates the average of the shorts in the array.
  `static Object`
  `average(Iterable<?> self)`
  Averages the items in an Iterable.
  `static <T> Object`
  `average(Iterable<T> self, Closure closure)`
  Averages the result of applying a closure to each item of an Iterable.
  `static Object`
  `average(Object[] self)`
  Averages the items in an array.
  `static Object`
  `average(Iterator<?> self)`
  Averages the items from an Iterator.
  `static <T> Object`
  `average(Iterator<T> self, Closure closure)`
  Averages the result of applying a closure to each item returned from an iterator.
  `static <T> Object`
  `average(T[] self, Closure closure)`
  Averages the result of applying a closure to each item of an array.
  `static Number`
  `bitwiseNegate(Number left)`
  Bitwise NEGATE a Number.
  `static BitSet`
  `bitwiseNegate(BitSet self)`
  Bitwise NEGATE a BitSet.
  `static <T> BufferedIterator<T>`
  `buffered(Iterator<T> self)`
  Returns a `BufferedIterator` that allows examining the next element without consuming it.
  `static <T> BufferedIterator<T>`
  `bufferedIterator(Iterable<T> self)`
  Returns a `BufferedIterator` that allows examining the next element without consuming it.
  `static <T> BufferedIterator<T>`
  `bufferedIterator(List<T> self)`
  Returns a `BufferedIterator` that allows examining the next element without consuming it.
  `protected static <T> T`
  `callClosureForLine(Closure<T> closure, String line, int counter)`
  `protected static <T, K, V> T`
  `callClosureForMapEntry(Closure<T> closure, Map.Entry<K,V> entry)`
  `protected static <T, K, V> T`
  `callClosureForMapEntryAndCounter(Closure<T> closure, Map.Entry<K,V> entry, int counter)`
  `static <T> List<List<T>>`
  `chop(Iterable<T> self, int... chopSizes)`
  Chops the Iterable into pieces, returning lists with sizes corresponding to the supplied chop sizes.
  `static <T> List<List<T>>`
  `chop(Iterator<T> self, int... chopSizes)`
  Chops the iterator items into pieces, returning lists with sizes corresponding to the supplied chop sizes.
  `static <T> List<List<T>>`
  `chop(T[] self, int... chopSizes)`
  Chops the array into pieces, returning lists with sizes corresponding to the supplied chop sizes.
  `static <T> List<List<T>>`
  `collate(Iterable<T> self, int size)`
  Collates this iterable into sub-lists of length `size`.
  `static <T> List<List<T>>`
  `collate(Iterable<T> self, int size, boolean keepRemainder)`
  Collates this iterable into sub-lists of length `size`.
  `static <T> List<List<T>>`
  `collate(Iterable<T> self, int size, int step)`
  Collates this iterable into sub-lists of length `size` stepping through the code `step` elements for each subList.
  `static <T> List<List<T>>`
  `collate(Iterable<T> self, int size, int step, boolean keepRemainder)`
  Collates this iterable into sub-lists of length `size` stepping through the code `step` elements for each sub-list.
  `static <T> List<List<T>>`
  `collate(T[] self, int size)`
  Collates an array.
  `static <T> List<List<T>>`
  `collate(T[] self, int size, boolean keepRemainder)`
  Collates this array into sub-lists.
  `static <T> List<List<T>>`
  `collate(T[] self, int size, int step)`
  Collates an array into sub-lists.
  `static <T> List<List<T>>`
  `collate(T[] self, int size, int step, boolean keepRemainder)`
  Collates this array into sub-lists.
  `static <E, T, C extends Collection<T>>
  C`
  `collect(E[] self, C collector, Closure<? extends T> transform)`
  Iterates through this Array transforming each item into a new value using the `transform` closure and adding it to the supplied `collector`.
  `static <E, T> List<T>`
  `collect(E[] self, Closure<T> transform)`
  Iterates through this Array transforming each item into a new value using the `transform` closure, returning a list of transformed values.
  `static <E, T, C extends Collection<T>>
  C`
  `collect(Iterable<E> self, C collector, Closure<? extends T> transform)`
  Iterates through this collection transforming each value into a new value using the `transform` closure and adding it to the supplied `collector`.
  `static <E, T> List<T>`
  `collect(Iterable<E> self, Closure<T> transform)`
  Iterates through this Iterable transforming each entry into a new value using the `transform` closure returning a list of transformed values.
  `static <T> List<T>`
  `collect(Iterable<T> self)`
  Iterates through this collection transforming each entry into a new value using Closure.IDENTITY as a transformer, basically returning a list of items copied from the original collection.
  `static Collection`
  `collect(Object self)`
  Iterates through this aggregate Object transforming each item into a new value using Closure.IDENTITY as a transformer, basically returning a list of items copied from the original object.
  `static <T, C extends Collection<T>>
  C`
  `collect(Object self, C collector, Closure<? extends T> transform)`
  Iterates through this aggregate Object transforming each item into a new value using the `transform` closure and adding it to the supplied `collector`.
  `static <T> List<T>`
  `collect(Object self, Closure<T> transform)`
  Iterates through this aggregate Object transforming each item into a new value using the `transform` closure, returning a list of transformed values.
  `static <E, T, C extends Collection<T>>
  C`
  `collect(Iterator<E> self, C collector, Closure<? extends T> transform)`
  Iterates through this Iterator transforming each item into a new value using the `transform` closure and adding it to the supplied `collector`.
  `static <E, T> List<T>`
  `collect(Iterator<E> self, Closure<T> transform)`
  Iterates through this Iterator transforming each item into a new value using the `transform` closure, returning a list of transformed values.
  `static <T, K, V, C extends Collection<T>>
  C`
  `collect(Map<K,V> self, C collector, Closure<? extends T> transform)`
  Iterates through this Map transforming each map entry into a new value using the `transform` closure returning the `collector` with all transformed values added to it.
  `static <T, K, V> List<T>`
  `collect(Map<K,V> self, Closure<T> transform)`
  Iterates through this Map transforming each map entry into a new value using the `transform` closure returning a list of transformed values.
  `static <K, V, E> Map<K,V>`
  `collectEntries(E[] self)`
  A variant of collectEntries using the identity closure as the transform.
  `static <K, V, E> Map<K,V>`
  `collectEntries(E[] self, Closure<?> transform)`
  Iterates through this array transforming each item using the `transform` closure and returning a map of the resulting transformed entries.
  `static <K, V, E> Map<K,V>`
  `collectEntries(E[] self, Map<K,V> collector)`
  A variant of collectEntries using the identity closure as the transform.
  `static <K, V, E> Map<K,V>`
  `collectEntries(E[] self, Map<K,V> collector, Closure<?> transform)`
  Iterates through this array transforming each item using the `transform` closure and returning a map of the resulting transformed entries.
  `static <K, V> Map<K,V>`
  `collectEntries(Iterable<?> self)`
  A variant of collectEntries for Iterable objects using the identity closure as the transform.
  `static <K, V> Map<K,V>`
  `collectEntries(Iterable<?> self, Map<K,V> collector)`
  A variant of collectEntries for Iterables using the identity closure as the transform and a supplied map as the destination of transformed entries.
  `static <K, V, E> Map<K,V>`
  `collectEntries(Iterable<E> self, Closure<?> transform)`
  Iterates through this Iterable transforming each item using the `transform` closure and returning a map of the resulting transformed entries.
  `static <K, V, E> Map<K,V>`
  `collectEntries(Iterable<E> self, Map<K,V> collector, Closure<?> transform)`
  Iterates through this Iterable transforming each item using the closure as a transformer into a map entry, returning the supplied map with all the transformed entries added to it.
  `static <K, V> Map<K,V>`
  `collectEntries(Iterator<?> self)`
  A variant of collectEntries for Iterators using the identity closure as the transform.
  `static <K, V> Map<K,V>`
  `collectEntries(Iterator<?> self, Map<K,V> collector)`
  A variant of collectEntries for Iterators using the identity closure as the transform and a supplied map as the destination of transformed entries.
  `static <K, V, E> Map<K,V>`
  `collectEntries(Iterator<E> self, Closure<?> transform)`
  A variant of collectEntries for Iterators.
  `static <K, V, E> Map<K,V>`
  `collectEntries(Iterator<E> self, Map<K,V> collector, Closure<?> transform)`
  A variant of collectEntries for Iterators using a supplied map as the destination of transformed entries.
  `static <K, V, X, Y> Map<K,V>`
  `collectEntries(Map<X,Y> self, Closure<?> transform)`
  Iterates through this Map transforming each entry using the `transform` closure and returning a map of the transformed entries.
  `static <K, V, X, Y> Map<K,V>`
  `collectEntries(Map<X,Y> self, Map<K,V> collector, Closure<?> transform)`
  Iterates through this Map transforming each map entry using the `transform` closure returning a map of the transformed entries.
  `static <T, E, C extends Collection<T>>
  C`
  `collectMany(E[] self, C collector, Closure<? extends Collection<? extends T>> projection)`
  Projects each item from a source array to a collection and concatenates (flattens) the resulting collections into a single list.
  `static <T, E> List<T>`
  `collectMany(E[] self, Closure<? extends Collection<? extends T>> projection)`
  Projects each item from a source array to a collection and concatenates (flattens) the resulting collections into a single list.
  `static <T, E, C extends Collection<T>>
  C`
  `collectMany(Iterable<E> self, C collector, Closure<? extends Collection<? extends T>> projection)`
  Projects each item from a source collection to a result collection and concatenates (flattens) the resulting collections adding them into the `collector`.
  `static <T, E> List<T>`
  `collectMany(Iterable<E> self, Closure<? extends Collection<? extends T>> projection)`
  Projects each item from a source Iterable to a collection and concatenates (flattens) the resulting collections into a single list.
  `static <T, E, C extends Collection<T>>
  C`
  `collectMany(Iterator<E> self, C collector, Closure<? extends Collection<? extends T>> projection)`
  Projects each item from a source iterator to a collection and concatenates (flattens) the resulting collections into a single list.
  `static <T, E> List<T>`
  `collectMany(Iterator<E> self, Closure<? extends Collection<? extends T>> projection)`
  Projects each item from a source iterator to a collection and concatenates (flattens) the resulting collections into a single list.
  `static <T, K, V, C extends Collection<T>>
  C`
  `collectMany(Map<K,V> self, C collector, Closure<? extends Collection<? extends T>> projection)`
  Projects each item from a source map to a result collection and concatenates (flattens) the resulting collections adding them into the `collector`.
  `static <T, K, V> List<T>`
  `collectMany(Map<K,V> self, Closure<? extends Collection<? extends T>> projection)`
  Projects each item from a source map to a result collection and concatenates (flattens) the resulting collections adding them into a collection.
  `static <T, K, V> Collection<T>`
  `collectMany$$bridge(Map<K,V> self, Closure<? extends Collection<? extends T>> projection)`
  Deprecated.
  `static <C extends Collection>
  C`
  `collectNested(Iterable self, C collector, Closure transform)`
  Recursively iterates through this Iterable transforming each non-Collection value into a new value using the `transform` closure.
  `static List`
  `collectNested(Iterable self, Closure transform)`
  Recursively iterates through this Iterable transforming each non-Collection value into a new value using the closure as a transformer.
  `static List`
  `collectNested(Collection self, Closure transform)`
  Recursively iterates through this collection transforming each non-Collection value into a new value using the closure as a transformer.
  `static List`
  `combinations(Iterable self)`
  Adds GroovyCollections#combinations(Iterable) as a method on Iterables.
  `static List`
  `combinations(Iterable self, Closure<?> function)`
  Adds GroovyCollections#combinations(Iterable, Closure) as a method on collections.
  `static int`
  `compareTo(Character left, Character right)`
  Compare two Characters.
  `static int`
  `compareTo(Character left, Number right)`
  Compare a Character and a Number.
  `static int`
  `compareTo(Number left, Character right)`
  Compare a Number and a Character.
  `static int`
  `compareTo(Number left, Number right)`
  Compare two Numbers.
  `static boolean`
  `contains(boolean[] self, Object value)`
  Checks whether the array contains the given value.
  `static boolean`
  `contains(byte[] self, Object value)`
  Checks whether the array contains the given value.
  `static boolean`
  `contains(char[] self, Object value)`
  Checks whether the array contains the given value.
  `static boolean`
  `contains(double[] self, Object value)`
  Checks whether the array contains the given value.
  `static boolean`
  `contains(float[] self, Object value)`
  Checks whether the array contains the given value.
  `static boolean`
  `contains(int[] self, Object value)`
  Checks whether the array contains the given value.
  `static boolean`
  `contains(long[] self, Object value)`
  Checks whether the array contains the given value.
  `static boolean`
  `contains(short[] self, Object value)`
  Checks whether the array contains the given value.
  `static boolean`
  `contains(Iterable self, Object item)`
  Returns `true` if this iterable contains the item.
  `static boolean`
  `contains(Object[] self, Object value)`
  Checks whether the array contains the given value.
  `static boolean`
  `containsAll(Iterable<?> self, Object[] items)`
  Returns `true` if this iterable contains all the elements in the specified array.
  `static Number`
  `count(boolean[] self, Object value)`
  Counts the number of occurrences of the given value inside this array.
  `static Number`
  `count(byte[] self, Object value)`
  Counts the number of occurrences of the given value inside this array.
  `static Number`
  `count(char[] self, Object value)`
  Counts the number of occurrences of the given value inside this array.
  `static Number`
  `count(double[] self, Object value)`
  Counts the number of occurrences of the given value inside this array.
  `static Number`
  `count(float[] self, Object value)`
  Counts the number of occurrences of the given value inside this array.
  `static Number`
  `count(int[] self, Object value)`
  Counts the number of occurrences of the given value inside this array.
  `static Number`
  `count(long[] self, Object value)`
  Counts the number of occurrences of the given value inside this array.
  `static Number`
  `count(short[] self, Object value)`
  Counts the number of occurrences of the given value inside this array.
  `static <T> Number`
  `count(Iterable<T> self, Closure closure)`
  Counts the number of occurrences which satisfy the given closure from inside this Iterable.
  `static Number`
  `count(Iterable self, Object value)`
  Counts the number of occurrences of the given value inside this Iterable.
  `static Number`
  `count(Object[] self, Object value)`
  Counts the number of occurrences of the given value inside this array.
  `static <T> Number`
  `count(Iterator<T> self, Closure closure)`
  Counts the number of occurrences which satisfy the given closure from the items within this Iterator.
  `static Number`
  `count(Iterator self, Object value)`
  Counts the number of occurrences of the given value from the items within this Iterator.
  `static <K, V> Number`
  `count(Map<K,V> self, Closure<?> closure)`
  Counts the number of occurrences which satisfy the given closure from inside this map.
  `static <T> Number`
  `count(T[] self, Closure closure)`
  Counts the number of occurrences which satisfy the given closure from inside this array.
  `static <K, E> Map<K,Integer>`
  `countBy(E[] self, Closure<K> closure)`
  Sorts all array members into groups determined by the supplied mapping closure and counts the group size.
  `static <K, E> Map<K,Integer>`
  `countBy(Iterable<E> self, Closure<K> closure)`
  Sorts all collection members into groups determined by the supplied mapping closure and counts the group size.
  `static <K, E> Map<K,Integer>`
  `countBy(Iterator<E> self, Closure<K> closure)`
  Sorts all iterator items into groups determined by the supplied mapping closure and counts the group size.
  `static <K, U, V> Map<K,Integer>`
  `countBy(Map<U,V> self, Closure<K> closure)`
  Groups the members of a map into groups determined by the supplied mapping closure and counts the frequency of the created groups.
  `static boolean`
  `disjoint(Iterable left, Iterable right)`
  Returns `true` if the intersection of two iterables is empty.
  `static Number`
  `div(Character left, Character right)`
  Divide one Character by another.
  `static Number`
  `div(Character left, Number right)`
  Divide a Character by a Number.
  `static Number`
  `div(Number left, Character right)`
  Divide a Number by a Character.
  `static void`
  `downto(double self, Number to, Closure closure)`
  Iterates from this number down to the given number, inclusive, decrementing by one each time.
  `static void`
  `downto(float self, Number to, Closure closure)`
  Iterates from this number down to the given number, inclusive, decrementing by one each time.
  `static void`
  `downto(long self, Number to, Closure closure)`
  Iterates from this number down to the given number, inclusive, decrementing by one each time.
  `static void`
  `downto(Double self, Number to, Closure closure)`
  Iterates from this number down to the given number, inclusive, decrementing by one each time.
  `static void`
  `downto(Float self, Number to, Closure closure)`
  Iterates from this number down to the given number, inclusive, decrementing by one each time.
  `static void`
  `downto(Long self, Number to, Closure closure)`
  Iterates from this number down to the given number, inclusive, decrementing by one each time.
  `static void`
  `downto(Number self, Number to, Closure closure)`
  Iterates from this number down to the given number, inclusive, decrementing by one each time.
  `static void`
  `downto(BigDecimal self, Number to, Closure closure)`
  Iterates from this number down to the given number, inclusive, decrementing by one each time.
  `static void`
  `downto(BigInteger self, Number to, Closure closure)`
  Iterates from this number down to the given number, inclusive, decrementing by one each time.
  `static <T> Collection<T>`
  `drop(Iterable<T> self, int num)`
  Drops the given number of elements from the head of this Iterable.
  `static <T> Iterator<T>`
  `drop(Iterator<T> self, int num)`
  Drops the given number of elements from the head of this iterator if they are available.
  `static <T> List<T>`
  `drop(List<T> self, int num)`
  Drops the given number of elements from the head of this List.
  `static <K, V> Map<K,V>`
  `drop(Map<K,V> self, int num)`
  Drops the given number of key/value pairs from the head of this map if they are available.
  `static <T> SortedSet<T>`
  `drop(SortedSet<T> self, int num)`
  Drops the given number of elements from the head of this List.
  `static <T> T[]`
  `drop(T[] self, int num)`
  Drops the given number of elements from the head of this array if they are available.
  `static <T> Collection<T>`
  `dropRight(Iterable<T> self, int num)`
  Drops the given number of elements from the tail of this Iterable.
  `static <T> Iterator<T>`
  `dropRight(Iterator<T> self, int num)`
  Drops the given number of elements from the tail of this Iterator.
  `static <T> List<T>`
  `dropRight(List<T> self, int num)`
  Drops the given number of elements from the tail of this List.
  `static <T> SortedSet<T>`
  `dropRight(SortedSet<T> self, int num)`
  Drops the given number of elements from the tail of this SortedSet.
  `static <T> T[]`
  `dropRight(T[] self, int num)`
  Drops the given number of elements from the tail of this array if they are available.
  `static <T> Collection<T>`
  `dropWhile(Iterable<T> self, Closure condition)`
  Returns a suffix of this Iterable where elements are dropped from the front while the given closure evaluates to true.
  `static <T> Iterator<T>`
  `dropWhile(Iterator<T> self, Closure<?> condition)`
  Creates an Iterator that returns a suffix of the elements from an original Iterator.
  `static <T> List<T>`
  `dropWhile(List<T> self, Closure condition)`
  Returns a suffix of this List where elements are dropped from the front while the given Closure evaluates to true.
  `static <K, V> Map<K,V>`
  `dropWhile(Map<K,V> self, Closure condition)`
  Create a suffix of the given Map by dropping as many entries as possible from the front of the original Map such that calling the given closure condition evaluates to true when passed each of the dropped entries (or key/value pairs).
  `static <T> SortedSet<T>`
  `dropWhile(SortedSet<T> self, Closure condition)`
  Returns a suffix of this SortedSet where elements are dropped from the front while the given Closure evaluates to true.
  `static <T> T[]`
  `dropWhile(T[] self, Closure<?> condition)`
  Create a suffix of the given array by dropping as many elements as possible from the front of the original array such that calling the given closure condition evaluates to true when passed each of the dropped elements.
  `static String`
  `dump(Object self)`
  Generates a detailed dump string of an object showing its class, hashCode and all accessible fields.
  `static <T> Iterable<T>`
  `each(Iterable<T> self, Closure closure)`
  Iterates through an Iterable, passing each item to the given closure.
  `static <T> Collection<T>`
  `each(Collection<T> self, Closure closure)`
  Iterates through a Collection, passing each item to the given closure.
  `static <T> Iterator<T>`
  `each(Iterator<T> self, Closure closure)`
  Iterates through an Iterator, passing each item to the given closure.
  `static <T> List<T>`
  `each(List<T> self, Closure closure)`
  Iterates through a List, passing each item to the given closure.
  `static <K, V> Map<K,V>`
  `each(Map<K,V> self, Closure<?> closure)`
  Allows a Map to be iterated through using a closure.
  `static <T> Set<T>`
  `each(Set<T> self, Closure closure)`
  Iterates through a Set, passing each item to the given closure.
  `static <T> SortedSet<T>`
  `each(SortedSet<T> self, Closure closure)`
  Iterates through a SortedSet, passing each item to the given closure.
  `static <T> T[]`
  `each(T[] self, Closure closure)`
  Iterates through an array passing each array entry to the given closure.
  `static <T> T`
  `each(T self, Closure closure)`
  Iterates through an aggregate type or data structure, passing each item to the given closure.
  `static void`
  `eachByte(byte[] self, Closure closure)`
  Traverse through each byte of this byte array.
  `static void`
  `eachByte(Byte[] self, Closure closure)`
  Traverse through each byte of this Byte array.
  `static void`
  `eachCombination(Iterable self, Closure<?> function)`
  Applies a function on each combination of the input lists.
  `static <T> Iterator<List<T>>`
  `eachPermutation(Iterable<T> self, Closure closure)`
  Iterates over all permutations of a collection, running a closure for each iteration.
  `static <T> Iterable<T>`
  `eachWithIndex(Iterable<T> self, Closure closure)`
  Iterates through an iterable type, passing each item and the item's index (a counter starting at zero) to the given closure.
  `static <T> Collection<T>`
  `eachWithIndex(Collection<T> self, Closure closure)`
  Iterates through a Collection, passing each item and the item's index (a counter starting at zero) to the given closure.
  `static <T> Iterator<T>`
  `eachWithIndex(Iterator<T> self, Closure closure)`
  Iterates through an iterator type, passing each item and the item's index (a counter starting at zero) to the given closure.
  `static <T> List<T>`
  `eachWithIndex(List<T> self, Closure closure)`
  Iterates through a List, passing each item and the item's index (a counter starting at zero) to the given closure.
  `static <K, V> Map<K,V>`
  `eachWithIndex(Map<K,V> self, Closure<?> closure)`
  Allows a Map to be iterated through using a closure.
  `static <T> Set<T>`
  `eachWithIndex(Set<T> self, Closure closure)`
  Iterates through a Set, passing each item and the item's index (a counter starting at zero) to the given closure.
  `static <T> SortedSet<T>`
  `eachWithIndex(SortedSet<T> self, Closure closure)`
  Iterates through a SortedSet, passing each item and the item's index (a counter starting at zero) to the given closure.
  `static <T> T[]`
  `eachWithIndex(T[] self, Closure closure)`
  Iterates through an array, passing each array element and the element's index (a counter starting at zero) to the given closure.
  `static <T> T`
  `eachWithIndex(T self, Closure closure)`
  Iterates through an aggregate type or data structure, passing each item and the item's index (a counter starting at zero) to the given closure.
  `static boolean`
  `equals(int[] left, int[] right)`
  Compare the contents of this array to the contents of the given array.
  `static boolean`
  `equals(Object[] left, List right)`
  Determines if the contents of this array are equal to the contents of the given list, in the same order.
  `static boolean`
  `equals(List left, Object[] right)`
  Determines if the contents of this list are equal to the contents of the given array in the same order.
  `static boolean`
  `equals(List left, List right)`
  Compare the contents of two Lists.
  `static boolean`
  `equals(Map self, Map other)`
  Compares two Maps treating coerced numerical values as identical.
  `static <T> boolean`
  `equals(Set<T> self, Set<T> other)`
  Compare the contents of two Sets for equality using Groovy's coercion rules.
  `static boolean`
  `equalsIgnoreZeroSign(Double number, Object other)`
  Compares this object against the specified object returning the same result as `Double.equals(Object)` but returning true if this object and the specified object are both zero and negative zero respectively or vice versa.
  `static boolean`
  `equalsIgnoreZeroSign(Float number, Object other)`
  Compares this object against the specified object returning the same result as `Float.equals(Object)` but returning true if this object and the specified object are both zero and negative zero respectively or vice versa.
  `static <T> boolean`
  `every(Iterable<T> self, Closure predicate)`
  Used to determine if the given predicate closure is valid (i.e.
  `static boolean`
  `every(Object self)`
  Iterates over every element of a collection, and checks whether all elements are `true` according to the Groovy Truth.
  `static boolean`
  `every(Object self, Closure predicate)`
  Used to determine if the given predicate closure is valid (i.e.
  `static <T> boolean`
  `every(Iterator<T> self, Closure predicate)`
  Used to determine if the given predicate closure is valid (i.e.
  `static <K, V> boolean`
  `every(Map<K,V> self, Closure predicate)`
  Iterates over the entries of a map, and checks whether a predicate is valid for all entries.
  `static <T> boolean`
  `every(T[] self, Closure predicate)`
  Used to determine if the given predicate closure is valid (i.e.
  `static Object`
  `find(Object self)`
  Finds the first item matching the IDENTITY Closure (i.e. matching Groovy truth).
  `static Object`
  `find(Object self, Closure closure)`
  Finds the first value matching the closure condition.
  `static <T> T`
  `find(Collection<T> self)`
  Finds the first item matching the IDENTITY Closure (i.e. matching Groovy truth).
  `static <T> T`
  `find(Collection<T> self, Closure closure)`
  Finds the first value matching the closure condition.
  `static <K, V> Map.Entry<K,V>`
  `find(Map<K,V> self, Closure<?> closure)`
  Finds the first entry matching the closure condition.
  `static <T> T`
  `find(T[] self, Closure condition)`
  Finds the first element in the array that matches the given closure condition.
  `static List`
  `findAll(Object self)`
  Finds all items matching the IDENTITY Closure (i.e. matching Groovy truth).
  `static List`
  `findAll(Object self, Closure closure)`
  Finds all items matching the closure condition.
  `static <T> Collection<T>`
  `findAll(Collection<T> self)`
  Finds the items matching the IDENTITY Closure (i.e. matching Groovy truth).
  `static <T> Collection<T>`
  `findAll(Collection<T> self, Closure closure)`
  Finds all values matching the closure condition.
  `static <T> List<T>`
  `findAll(List<T> self)`
  Finds the items matching the IDENTITY Closure (i.e. matching Groovy truth).
  `static <T> List<T>`
  `findAll(List<T> self, Closure closure)`
  Finds all values matching the closure condition.
  `static <K, V> Map<K,V>`
  `findAll(Map<K,V> self, Closure closure)`
  Finds all entries matching the closure condition.
  `static <T> Set<T>`
  `findAll(Set<T> self)`
  Finds the items matching the IDENTITY Closure (i.e. matching Groovy truth).
  `static <T> Set<T>`
  `findAll(Set<T> self, Closure closure)`
  Finds all values matching the closure condition.
  `static <T> List<T>`
  `findAll(T[] self)`
  Finds the elements of the array matching the IDENTITY Closure (i.e. matching Groovy truth).
  `static <T> List<T>`
  `findAll(T[] self, Closure condition)`
  Finds all elements of the array matching the given Closure condition.
  `static Collection`
  `findAll$$bridge(Object self)`
  Deprecated.
  `static Collection`
  `findAll$$bridge(Object self, Closure closure)`
  Deprecated.
  `static <T> Collection<T>`
  `findAll$$bridge(T[] self)`
  Deprecated.
  `static <T> Collection<T>`
  `findAll$$bridge(T[] self, Closure condition)`
  Deprecated.
  `static <T> int`
  `findIndexOf(Iterable<T> self, int startIndex, Closure condition)`
  Iterates over the elements of an Iterable, starting from a specified startIndex, and returns the index of the first item that satisfies the condition specified by the closure.
  `static <T> int`
  `findIndexOf(Iterable<T> self, Closure condition)`
  Iterates over the elements of an Iterable and returns the index of the first item that satisfies the condition specified by the closure.
  `static int`
  `findIndexOf(Object self, int startIndex, Closure condition)`
  Iterates over the elements of an aggregate of items, starting from a specified startIndex, and returns the index of the first item that matches the condition specified in the closure.
  `static int`
  `findIndexOf(Object self, Closure condition)`
  Iterates over the elements of an aggregate of items and returns the index of the first item that matches the condition specified in the closure.
  `static <T> int`
  `findIndexOf(Iterator<T> self, int startIndex, Closure condition)`
  Iterates over the elements of an Iterator, starting from a specified startIndex, and returns the index of the first item that satisfies the condition specified by the closure.
  `static <T> int`
  `findIndexOf(Iterator<T> self, Closure condition)`
  Iterates over the elements of an Iterator and returns the index of the first item that satisfies the condition specified by the closure.
  `static <T> int`
  `findIndexOf(T[] self, int startIndex, Closure condition)`
  Iterates over the elements of an Array, starting from a specified startIndex, and returns the index of the first item that satisfies the condition specified by the closure.
  `static <T> int`
  `findIndexOf(T[] self, Closure condition)`
  Iterates over the elements of an Array and returns the index of the first item that satisfies the condition specified by the closure.
  `static <T> List<Number>`
  `findIndexValues(Iterable<T> self, Closure condition)`
  Iterates over the elements of an Iterable and returns the index values of the items that match the condition specified in the closure.
  `static <T> List<Number>`
  `findIndexValues(Iterable<T> self, Number startIndex, Closure condition)`
  Iterates over the elements of an Iterable, starting from a specified startIndex, and returns the index values of the items that match the condition specified in the closure.
  `static List<Number>`
  `findIndexValues(Object self, Closure condition)`
  Iterates over the elements of an aggregate of items and returns the index values of the items that match the condition specified in the closure.
  `static List<Number>`
  `findIndexValues(Object self, Number startIndex, Closure condition)`
  Iterates over the elements of an aggregate of items, starting from a specified startIndex, and returns the index values of the items that match the condition specified in the closure.
  `static <T> List<Number>`
  `findIndexValues(Iterator<T> self, Closure condition)`
  Iterates over the elements of an Iterator and returns the index values of the items that match the condition specified in the closure.
  `static <T> List<Number>`
  `findIndexValues(Iterator<T> self, Number startIndex, Closure condition)`
  Iterates over the elements of an Iterator, starting from a specified startIndex, and returns the index values of the items that match the condition specified in the closure.
  `static <T> List<Number>`
  `findIndexValues(T[] self, Closure condition)`
  Iterates over the elements of an Array and returns the index values of the items that match the condition specified in the closure.
  `static <T> List<Number>`
  `findIndexValues(T[] self, Number startIndex, Closure condition)`
  Iterates over the elements of an Array, starting from a specified startIndex, and returns the index values of the items that match the condition specified in the closure.
  `static <T> int`
  `findLastIndexOf(Iterable<T> self, int startIndex, Closure condition)`
  Iterates over the elements of an Iterable, starting from a specified startIndex, and returns the index of the last item that matches the condition specified in the closure.
  `static <T> int`
  `findLastIndexOf(Iterable<T> self, Closure condition)`
  Iterates over the elements of an Iterable and returns the index of the last item that matches the condition specified in the closure.
  `static int`
  `findLastIndexOf(Object self, int startIndex, Closure condition)`
  Iterates over the elements of an aggregate of items, starting from a specified startIndex, and returns the index of the last item that matches the condition specified in the closure.
  `static int`
  `findLastIndexOf(Object self, Closure condition)`
  Iterates over the elements of an aggregate of items and returns the index of the last item that matches the condition specified in the closure.
  `static <T> int`
  `findLastIndexOf(Iterator<T> self, int startIndex, Closure condition)`
  Iterates over the elements of an Iterator, starting from a specified startIndex, and returns the index of the last item that matches the condition specified in the closure.
  `static <T> int`
  `findLastIndexOf(Iterator<T> self, Closure condition)`
  Iterates over the elements of an Iterator and returns the index of the last item that matches the condition specified in the closure.
  `static <T> int`
  `findLastIndexOf(T[] self, int startIndex, Closure condition)`
  Iterates over the elements of an Array, starting from a specified startIndex, and returns the index of the last item that matches the condition specified in the closure.
  `static <T> int`
  `findLastIndexOf(T[] self, Closure condition)`
  Iterates over the elements of an Array and returns the index of the last item that matches the condition specified in the closure.
  `static <S, T, U extends T, V extends T>
  T`
  `findResult(Iterable<S> self, U defaultResult, Closure<V> condition)`
  Iterates through the Iterable calling the given closure condition for each item but stopping once the first non-null result is found and returning that result.
  `static <T> T`
  `findResult(Iterable<T> self)`
  Iterates through the Iterable stopping once the first non-null result is found and returning that result.
  `static <T, U> T`
  `findResult(Iterable<U> self, Closure<T> condition)`
  Iterates through the Iterable calling the given closure condition for each item but stopping once the first non-null result is found and returning that result.
  `static <T, U extends T, V extends T>
  T`
  `findResult(Iterable<U> self, V defaultResult)`
  Iterates through the Iterable calling the given closure condition for each item but stopping once the first non-null result is found and returning that result.
  `static Object`
  `findResult(Object self)`
  Treats the object as iterable, iterating through the values it represents and returns the first non-null value, otherwise returns null.
  `static Object`
  `findResult(Object self, Closure condition)`
  Treats the object as iterable, iterating through the values it represents and returns the first non-null result obtained from calling the closure, otherwise returns null.
  `static Object`
  `findResult(Object self, Object defaultResult)`
  Treats the object as iterable, iterating through the values it represents and returns the first non-null result, otherwise returns the defaultResult.
  `static Object`
  `findResult(Object self, Object defaultResult, Closure condition)`
  Treats the object as iterable, iterating through the values it represents and returns the first non-null result obtained from calling the closure, otherwise returns the defaultResult.
  `static <S, T, U extends T, V extends T>
  T`
  `findResult(Iterator<S> self, U defaultResult, Closure<V> condition)`
  Iterates through the Iterator calling the given closure condition for each item but stopping once the first non-null result is found and returning that result.
  `static <T> T`
  `findResult(Iterator<T> self)`
  Iterates through the Iterator stopping once the first non-null result is found and returning that result.
  `static <T, U> T`
  `findResult(Iterator<U> self, Closure<T> condition)`
  Iterates through the Iterator calling the given closure condition for each item but stopping once the first non-null result is found and returning that result.
  `static <T, U extends T, V extends T>
  T`
  `findResult(Iterator<U> self, V defaultResult)`
  Iterates through the Iterator stopping once the first non-null result is found and returning that result.
  `static <T, U extends T, V extends T, A, B>
  T`
  `findResult(Map<A,B> self, U defaultResult, Closure<V> condition)`
  Returns the first non-null closure result found by passing each map entry to the closure, otherwise the defaultResult is returned.
  `static <T, K, V> T`
  `findResult(Map<K,V> self, Closure<T> condition)`
  Returns the first non-null closure result found by passing each map entry to the closure, otherwise null is returned.
  `static <S, T> T`
  `findResult(S[] self, Closure<T> condition)`
  Iterates through the Array calling the given closure condition for each item but stopping once the first non-null result is found and returning that result.
  `static <S, T, U extends T, V extends T>
  T`
  `findResult(S[] self, U defaultResult, Closure<V> condition)`
  Iterates through the Array calling the given closure condition for each item but stopping once the first non-null result is found and returning that result.
  `static <T> T`
  `findResult(T[] self)`
  Iterates through the Array stopping once the first non-null result is found and returning that result.
  `static <T, U extends T, V extends T>
  T`
  `findResult(U[] self, V defaultResult)`
  Iterates through the Array stopping once the first non-null result is found and returning that result.
  `static <T> Collection<T>`
  `findResults(Iterable<T> self)`
  Iterates through the Iterable collecting any non-null results.
  `static <T, U> Collection<T>`
  `findResults(Iterable<U> self, Closure<T> filteringTransform)`
  Iterates through the Iterable transforming items using the supplied closure and collecting any non-null results.
  `static <T> Collection<T>`
  `findResults(Iterator<T> self)`
  Iterates through the Iterator collecting any non-null results.
  `static <T, U> Collection<T>`
  `findResults(Iterator<U> self, Closure<T> filteringTransform)`
  Iterates through the Iterator transforming items using the supplied closure and collecting any non-null results.
  `static <T, K, V> Collection<T>`
  `findResults(Map<K,V> self, Closure<T> filteringTransform)`
  Iterates through the map transforming items using the supplied closure and collecting any non-null results.
  `static <T> Collection<T>`
  `findResults(T[] self)`
  Iterates through the Array collecting any non-null results.
  `static <T, U> Collection<T>`
  `findResults(U[] self, Closure<T> filteringTransform)`
  Iterates through the Array transforming items using the supplied closure and collecting any non-null results.
  `static <T> T`
  `first(Iterable<T> self)`
  Returns the first item from the Iterable.
  `static <T> T`
  `first(List<T> self)`
  Returns the first item from the List.
  `static <T> T`
  `first(T[] self)`
  Returns the first item from the array.
  `static Collection`
  `flatten(boolean[] self)`
  Flatten an array.
  `static Collection`
  `flatten(byte[] self)`
  Flatten an array.
  `static Collection`
  `flatten(char[] self)`
  Flatten an array.
  `static Collection`
  `flatten(double[] self)`
  Flatten an array.
  `static Collection`
  `flatten(float[] self)`
  Flatten an array.
  `static Collection`
  `flatten(int[] self)`
  Flatten an array.
  `static Collection`
  `flatten(long[] self)`
  Flatten an array.
  `static Collection`
  `flatten(short[] self)`
  Flatten an array.
  `static Collection<?>`
  `flatten(Iterable<?> self)`
  Flatten an Iterable.
  `static <T> Collection<T>`
  `flatten(Iterable<T> self, Closure<? extends T> flattenUsing)`
  Flatten an Iterable.
  `static Collection`
  `flatten(Object[] self)`
  Flatten an array.
  `static Collection<?>`
  `flatten(Collection<?> self)`
  Flatten a Collection.
  `static List<?>`
  `flatten(List<?> self)`
  Flatten a List.
  `static Set<?>`
  `flatten(Set<?> self)`
  Flatten a Set.
  `static SortedSet<?>`
  `flatten(SortedSet<?> self)`
  Flatten a SortedSet.
  `static <K, V> V`
  `get(Map<K,V> map, K key, V defaultValue)`
  Looks up an item in a Map for the given key and returns the corresponding value.
  `static List<Boolean>`
  `getAt(boolean[] array, IntRange range)`
  Support the subscript operator with an IntRange for a boolean array
  `static List<Boolean>`
  `getAt(boolean[] array, ObjectRange range)`
  Support the subscript operator with an ObjectRange for a byte array
  `static List<Boolean>`
  `getAt(boolean[] array, Range range)`
  Support the subscript operator with a range for a boolean array
  `static List<Boolean>`
  `getAt(boolean[] array, Collection indices)`
  Support the subscript operator with a collection for a boolean array
  `static List<Byte>`
  `getAt(byte[] array, IntRange range)`
  Support the subscript operator with an IntRange for a byte array
  `static List<Byte>`
  `getAt(byte[] array, ObjectRange range)`
  Support the subscript operator with an ObjectRange for a byte array
  `static List<Byte>`
  `getAt(byte[] array, Range range)`
  Support the subscript operator with a range for a byte array
  `static List<Byte>`
  `getAt(byte[] array, Collection indices)`
  Support the subscript operator with a collection for a byte array
  `static List<Character>`
  `getAt(char[] array, IntRange range)`
  Support the subscript operator with an IntRange for a char array
  `static List<Character>`
  `getAt(char[] array, ObjectRange range)`
  Support the subscript operator with an ObjectRange for a char array
  `static List<Character>`
  `getAt(char[] array, Range range)`
  Support the subscript operator with a range for a char array
  `static List<Character>`
  `getAt(char[] array, Collection indices)`
  Support the subscript operator with a collection for a char array
  `static List<Double>`
  `getAt(double[] array, IntRange range)`
  Support the subscript operator with an IntRange for a double array
  `static List<Double>`
  `getAt(double[] array, ObjectRange range)`
  Support the subscript operator with an ObjectRange for a double array
  `static List<Double>`
  `getAt(double[] array, Range range)`
  Support the subscript operator with a range for a double array
  `static List<Double>`
  `getAt(double[] array, Collection indices)`
  Support the subscript operator with a collection for a double array
  `static List<Float>`
  `getAt(float[] array, IntRange range)`
  Support the subscript operator with an IntRange for a float array
  `static List<Float>`
  `getAt(float[] array, ObjectRange range)`
  Support the subscript operator with an ObjectRange for a float array
  `static List<Float>`
  `getAt(float[] array, Range range)`
  Support the subscript operator with a range for a float array
  `static List<Float>`
  `getAt(float[] array, Collection indices)`
  Support the subscript operator with a collection for a float array
  `static List<Integer>`
  `getAt(int[] array, IntRange range)`
  Support the subscript operator with an IntRange for an int array
  `static List<Integer>`
  `getAt(int[] array, ObjectRange range)`
  Support the subscript operator with an ObjectRange for an int array
  `static List<Integer>`
  `getAt(int[] array, Range range)`
  Support the subscript operator with a range for an int array
  `static List<Integer>`
  `getAt(int[] array, Collection indices)`
  Support the subscript operator with a collection for an int array
  `static List<Long>`
  `getAt(long[] array, IntRange range)`
  Support the subscript operator with an IntRange for a long array
  `static List<Long>`
  `getAt(long[] array, ObjectRange range)`
  Support the subscript operator with an ObjectRange for a long array
  `static List<Long>`
  `getAt(long[] array, Range range)`
  Support the subscript operator with a range for a long array
  `static List<Long>`
  `getAt(long[] array, Collection indices)`
  Support the subscript operator with a collection for a long array
  `static List<Short>`
  `getAt(short[] array, IntRange range)`
  Support the subscript operator with an IntRange for a short array
  `static List<Short>`
  `getAt(short[] array, ObjectRange range)`
  Support the subscript operator with an ObjectRange for a short array
  `static List<Short>`
  `getAt(short[] array, Range range)`
  Support the subscript operator with a range for a short array
  `static List<Short>`
  `getAt(short[] array, Collection indices)`
  Support the subscript operator with a collection for a short array
  `static <T> List<T>`
  `getAt(ListWithDefault<T> self, EmptyRange range)`
  Support the range subscript operator for an eager or lazy List.
  `static <T> List<T>`
  `getAt(ListWithDefault<T> self, Range range)`
  Support the range subscript operator for an eager or lazy List.
  `static <T> List<T>`
  `getAt(ListWithDefault<T> self, Collection indices)`
  Select a List of items from an eager or lazy List using a Collection to identify the indices to be selected.
  `static <T> T`
  `getAt(Iterable<T> self, int idx)`
  Support the subscript operator for an Iterable.
  `static Object`
  `getAt(Object self, String property)`
  Allows the subscript operator to be used to lookup dynamic property values.
  `static boolean`
  `getAt(BitSet self, int index)`
  Support the subscript operator for a Bitset
  `static BitSet`
  `getAt(BitSet self, IntRange range)`
  Support retrieving a subset of a BitSet using a Range
  `static List`
  `getAt(Collection coll, String property)`
  Support the subscript operator for Collection.
  `static <T> T`
  `getAt(Iterator<T> self, int idx)`
  Support the subscript operator for an Iterator.
  `static <T> T`
  `getAt(List<T> self, int idx)`
  Support the subscript operator for a List.
  `static <T> List<T>`
  `getAt(List<T> self, EmptyRange range)`
  Support the range subscript operator for a List.
  `static <T> List<T>`
  `getAt(List<T> self, Range range)`
  Support the range subscript operator for a List.
  `static <T> T`
  `getAt(List<T> self, Number idx)`
  Support subscript operator for list access.
  `static <T> List<T>`
  `getAt(List<T> self, Collection indices)`
  Select a List of items from a List using a Collection to identify the indices to be selected.
  `static <K, V> V`
  `getAt(Map<K,V> self, Object key)`
  Support the subscript operator for a Map.
  `static <T> List<T>`
  `getAt(T[] array, EmptyRange range)`
  `static <T> List<T>`
  `getAt(T[] array, IntRange range)`
  `static <T> List<T>`
  `getAt(T[] array, ObjectRange range)`
  `static <T> List<T>`
  `getAt(T[] array, Range range)`
  Support the range subscript operator for an Array
  `static <T> List<T>`
  `getAt(T[] self, Collection indices)`
  Select a List of items from an array using a Collection to identify the indices to be selected.
  `static Groovydoc`
  `getGroovydoc(AnnotatedElement holder)`
  Get runtime groovydoc
  `static IntRange`
  `getIndices(boolean[] self)`
  Returns indices of the boolean array.
  `static IntRange`
  `getIndices(byte[] self)`
  Returns indices of the byte array.
  `static IntRange`
  `getIndices(char[] self)`
  Returns indices of the char array.
  `static IntRange`
  `getIndices(double[] self)`
  Returns indices of the double array.
  `static IntRange`
  `getIndices(float[] self)`
  Returns indices of the float array.
  `static IntRange`
  `getIndices(int[] self)`
  Returns indices of the int array.
  `static IntRange`
  `getIndices(long[] self)`
  Returns indices of the long array.
  `static IntRange`
  `getIndices(short[] self)`
  Returns indices of the short array.
  `static IntRange`
  `getIndices(Collection self)`
  Returns indices of the collection.
  `static <T> IntRange`
  `getIndices(T[] self)`
  Returns indices of the array.
  `static URL`
  `getLocation(Class self)`
  Gets the url of the jar file/source file containing the specified class
  `static MetaClass`
  `getMetaClass(GroovyObject obj)`
  Obtains a MetaClass for an object either from the registry or in the case of a GroovyObject from the object itself.
  `static MetaClass`
  `getMetaClass(Class c)`
  Adds a "metaClass" property to all class objects so you can use the syntax `String.metaClass.myMethod = { println "foo" }`
  `static MetaClass`
  `getMetaClass(Object obj)`
  Obtains a MetaClass for an object either from the registry or in the case of a GroovyObject from the object itself.
  `static List<PropertyValue>`
  `getMetaPropertyValues(Object self)`
  Retrieves the list of `MetaProperty` objects for 'self' and wraps it in a list of `PropertyValue` objects that additionally provide the value for each property of 'self'.
  `static Map`
  `getProperties(Object self)`
  Convenience method that calls `getMetaPropertyValues(java.lang.Object)`(self) and provides the data in form of simple key/value pairs, i.e.
  `static ClassLoader`
  `getRootLoader(ClassLoader self)`
  Iterates through the classloader parents until it finds a loader with a class named "org.codehaus.groovy.tools.RootLoader".
  `protected static List`
  `getSubList(List self, List splice)`
  Deprecated.
  `static Collection`
  `grep(Object self)`
  Iterates over the collection of items which this Object represents and returns each item that matches using the IDENTITY Closure as a filter - effectively returning all elements which satisfy Groovy truth.
  `static Collection`
  `grep(Object self, Object filter)`
  Iterates over the collection of items which this Object represents and returns each item that matches the given filter - calling the ``isCase(java.lang.Object, java.lang.Object)`` method used by switch statements.
  `static <T> Collection<T>`
  `grep(Collection<T> self)`
  Iterates over the collection returning each element that matches using the IDENTITY Closure as a filter - effectively returning all elements which satisfy Groovy truth.
  `static <T> Collection<T>`
  `grep(Collection<T> self, Object filter)`
  Iterates over the collection of items and returns each item that matches the given filter - calling the ``isCase(java.lang.Object, java.lang.Object)`` method used by switch statements.
  `static <T> List<T>`
  `grep(List<T> self)`
  Iterates over the collection returning each element that matches using the IDENTITY Closure as a filter - effectively returning all elements which satisfy Groovy truth.
  `static <T> List<T>`
  `grep(List<T> self, Object filter)`
  Iterates over the collection of items and returns each item that matches the given filter - calling the ``isCase(java.lang.Object, java.lang.Object)`` method used by switch statements.
  `static <T> Set<T>`
  `grep(Set<T> self)`
  Iterates over the collection returning each element that matches using the IDENTITY Closure as a filter - effectively returning all elements which satisfy Groovy truth.
  `static <T> Set<T>`
  `grep(Set<T> self, Object filter)`
  Iterates over the collection of items and returns each item that matches the given filter - calling the ``isCase(java.lang.Object, java.lang.Object)`` method used by switch statements.
  `static <T> Collection<T>`
  `grep(T[] self)`
  Iterates over the array returning each element that matches using the IDENTITY Closure as a filter - effectively returning all elements which satisfy Groovy truth.
  `static <T> Collection<T>`
  `grep(T[] self, Object filter)`
  Iterates over the array of items and returns a collection of items that match the given filter - calling the ``isCase(java.lang.Object, java.lang.Object)`` method used by switch statements.
  `protected static <K, T> void`
  `groupAnswer(Map<K,List<T>> answer, T element, K value)`
  Groups the current element according to the value
  `static <K, T> Map<K,List<T>>`
  `groupBy(Iterable<T> self, Closure<K> closure)`
  Sorts all Iterable members into groups determined by the supplied mapping closure.
  `static Map`
  `groupBy(Iterable self, Object... closures)`
  Sorts all Iterable members into (sub)groups determined by the supplied mapping closures.
  `static Map`
  `groupBy(Iterable self, List<Closure> closures)`
  Sorts all Iterable members into (sub)groups determined by the supplied mapping closures.
  `static Map`
  `groupBy(Object[] self, Object... closures)`
  Sorts all array members into (sub)groups determined by the supplied mapping closures as per the Iterable variant of this method.
  `static Map`
  `groupBy(Object[] self, List<Closure> closures)`
  Sorts all array members into (sub)groups determined by the supplied mapping closures as per the list variant of this method.
  `static <G, K, V> Map<G,Map<K,V>>`
  `groupBy(Map<K,V> self, Closure<G> closure)`
  Groups the members of a map into sub maps determined by the supplied mapping closure.
  `static Map<Object,Map>`
  `groupBy(Map self, Object... closures)`
  Groups the members of a map into sub maps determined by the supplied mapping closures.
  `static Map<Object,Map>`
  `groupBy(Map self, List<Closure> closures)`
  Groups the members of a map into sub maps determined by the supplied mapping closures.
  `static <K, T> Map<K,List<T>>`
  `groupBy(T[] self, Closure<K> closure)`
  Sorts all array members into groups determined by the supplied mapping closure.
  `static <G, K, V> Map<G,List<Map.Entry<K,V>>>`
  `groupEntriesBy(Map<K,V> self, Closure<G> closure)`
  Groups all map entries into groups determined by the supplied mapping closure.
  `static MetaProperty`
  `hasProperty(Object self, String name)`
  Returns true of the implementing MetaClass has a property of the given name
  `static <T> T`
  `head(Iterable<T> self)`
  Returns the first item from the Iterable.
  `static <T> T`
  `head(List<T> self)`
  Returns the first item from the List.
  `static <T> T`
  `head(T[] self)`
  Returns the first item from the Object array.
  `static <T, U> T`
  `identity(U self, Closure<T> closure)`
  Allows the closure to be called for the object reference self.
  `static Boolean`
  `implies(Boolean left, Boolean right)`
  Logical implication of two boolean operators
  `static Map<Integer,Double>`
  `indexed(double[] self)`
  Zips a double[] with indices in (index, value) order starting from index 0.
  `static Map<Integer,Double>`
  `indexed(double[] self, int offset)`
  Zips a double[] with indices in (index, value) order.
  `static Map<Integer,Integer>`
  `indexed(int[] self)`
  Zips an int[] with indices in (index, value) order starting from index 0.
  `static Map<Integer,Integer>`
  `indexed(int[] self, int offset)`
  Zips an int[] with indices in (index, value) order.
  `static Map<Integer,Long>`
  `indexed(long[] self)`
  Zips a long[] with indices in (index, value) order starting from index 0.
  `static Map<Integer,Long>`
  `indexed(long[] self, int offset)`
  Zips a long[] with indices in (index, value) order.
  `static <E> Map<Integer,E>`
  `indexed(Iterable<E> self)`
  Zips an Iterable with indices in (index, value) order.
  `static <E> Map<Integer,E>`
  `indexed(Iterable<E> self, int offset)`
  Zips an Iterable with indices in (index, value) order.
  `static <E> Iterator<Tuple2<Integer,E>>`
  `indexed(Iterator<E> self)`
  Zips an iterator with indices in (index, value) order.
  `static <E> Iterator<Tuple2<Integer,E>>`
  `indexed(Iterator<E> self, int offset)`
  Zips an iterator with indices in (index, value) order.
  `static <T> Collection<T>`
  `init(Iterable<T> self)`
  Returns the items from the Iterable excluding the last item.
  `static <T> Iterator<T>`
  `init(Iterator<T> self)`
  Returns an Iterator containing all the items from this iterator except the last one.
  `static <T> List<T>`
  `init(List<T> self)`
  Returns the items from the List excluding the last item.
  `static <T> SortedSet<T>`
  `init(SortedSet<T> self)`
  Returns the items from the SortedSet excluding the last item.
  `static <T> T[]`
  `init(T[] self)`
  Returns the items from the Object array excluding the last item.
  `static <T> List<List<T>>`
  `inits(Iterable<T> self)`
  Calculates the init values of this Iterable: the first value will be this list of all items from the iterable and the final one will be an empty list, with the intervening values the results of successive applications of init on the items.
  `static <E, T, V extends T>
  T`
  `inject(E[] self, Closure<V> closure)`
  Iterates through the given array as with inject(Object[],initialValue,closure), but using the first element of the array as the initialValue, and then iterating the remaining elements of the array.
  `static <E, T, U extends T, V extends T>
  T`
  `inject(E[] self, U initialValue, Closure<V> closure)`
  Iterates through the given array, passing in the initial value to the closure along with the first item.
  `static <T, V extends T>
  T`
  `inject(Object self, Closure<V> closure)`
  Iterates through the given Object, passing in the first value to the closure along with the first item.
  `static <T, U extends T, V extends T>
  T`
  `inject(Object self, U initialValue, Closure<V> closure)`
  Iterates through the given Object, passing in the initial value to the closure along with the first item.
  `static <E, T, U extends T, V extends T>
  T`
  `inject(Collection<E> self, U initialValue, Closure<V> closure)`
  Iterates through the given Collection, passing in the initial value to the 2-arg closure along with the first item.
  `static <T, V extends T>
  T`
  `inject(Collection<T> self, Closure<V> closure)`
  Performs the same function as the version of inject that takes an initial value, but uses the head of the Collection as the initial value, and iterates over the tail.
  `static <E, T, U extends T, V extends T>
  T`
  `inject(Iterator<E> self, U initialValue, Closure<V> closure)`
  Iterates through the given Iterator, passing in the initial value to the closure along with the first item.
  `static <K, V, T, U extends T, W extends T>
  T`
  `inject(Map<K,V> self, U initialValue, Closure<W> closure)`
  Iterates through the given Map, passing in the initial value to the 2-arg Closure along with the first item (or 3-arg Closure along with the first key and value).
  `static String`
  `inspect(Object self)`
  Inspects returns the String that matches what would be typed into a terminal to create this object.
  `static Number`
  `intdiv(Character left, Character right)`
  Integer Divide two Characters.
  `static Number`
  `intdiv(Character left, Number right)`
  Integer Divide a Character by a Number.
  `static Number`
  `intdiv(Number left, Character right)`
  Integer Divide a Number by a Character.
  `static Number`
  `intdiv(Number left, Number right)`
  Integer Divide two Numbers.
  `static <T> Collection<T>`
  `intersect(Iterable<T> left, Iterable<T> right)`
  Create a Collection composed of the intersection of both iterables.
  `static <T> Collection<T>`
  `intersect(Iterable<T> left, Iterable<T> right, Closure condition)`
  Create a Collection composed of the intersection of both iterables.
  `static <T> Collection<T>`
  `intersect(Iterable<T> left, Iterable<T> right, Comparator<? super T> comparator)`
  Create a Collection composed of the intersection of both iterables.
  `static <T> Collection<T>`
  `intersect(Collection<T> left, Collection<T> right)`
  Create a Collection composed of the intersection of both collections.
  `static <T> Collection<T>`
  `intersect(Collection<T> left, Collection<T> right, Comparator<? super T> comparator)`
  Create a Collection composed of the intersection of both collections.
  `static <T> List<T>`
  `intersect(List<T> left, Iterable<T> right)`
  Create a List composed of the intersection of a List and an Iterable.
  `static <T> List<T>`
  `intersect(List<T> left, Iterable<T> right, Comparator<? super T> comparator)`
  Create a List composed of the intersection of a List and an Iterable.
  `static <K, V> Map<K,V>`
  `intersect(Map<K,V> left, Map<K,V> right)`
  Create a Map composed of the intersection of both maps.
  `static <T> Set<T>`
  `intersect(Set<T> left, Iterable<T> right)`
  Create a Set composed of the intersection of a Set and an Iterable.
  `static <T> Set<T>`
  `intersect(Set<T> left, Iterable<T> right, Comparator<? super T> comparator)`
  Create a Set composed of the intersection of a Set and an Iterable.
  `static <T> SortedSet<T>`
  `intersect(SortedSet<T> left, Iterable<T> right)`
  Create a SortedSet composed of the intersection of a SortedSet and an Iterable.
  `static <T> SortedSet<T>`
  `intersect(SortedSet<T> left, Iterable<T> right, Comparator<? super T> comparator)`
  Create a SortedSet composed of the intersection of a SortedSet and an Iterable.
  `static Object`
  `invokeMethod(Object object, String method, Object arguments)`
  Provide a dynamic method invocation method which can be overloaded in classes to implement dynamic proxies easily.
  `static boolean`
  `is(Object self, Object other)`
  Identity check.
  `static Boolean`
  `isAtLeast(BigDecimal left, String right)`
  Compare a BigDecimal to a String representing a number.
  `static Boolean`
  `isAtLeast(BigDecimal left, BigDecimal right)`
  Compare a BigDecimal to another.
  `static boolean`
  `isCase(Class caseValue, Object switchValue)`
  Special 'Case' implementation for Class, which allows testing whether some switch value is assignable from the given case class.
  `static boolean`
  `isCase(Number caseValue, Number switchValue)`
  Special 'case' implementation for all numbers, which delegates to the `compareTo()` method for comparing numbers of different types.
  `static boolean`
  `isCase(Object caseValue, Object switchValue)`
  Method for overloading the behavior of the 'case' method in switch statements.
  `static boolean`
  `isCase(Collection caseValue, Object switchValue)`
  'Case' implementation for collections which tests if the 'switch' operand is contained in any of the 'case' values.
  `static boolean`
  `isCase(Map caseValue, Object switchValue)`
  'Case' implementation for maps which tests the groovy truth value obtained using the 'switch' operand as key.
  `static boolean`
  `isDigit(Character self)`
  Determines if a character is a digit.
  `static boolean`
  `isEmpty(Iterable self)`
  Check whether an `Iterable` has elements
  `static boolean`
  `isLetter(Character self)`
  Determines if a character is a letter.
  `static boolean`
  `isLetterOrDigit(Character self)`
  Determines if a character is a letter or digit.
  `static boolean`
  `isLowerCase(Character self)`
  Determine if a Character is lowercase.
  `static boolean`
  `isNotCase(Closure<?> caseValue, Object switchValue)`
  `static boolean`
  `isNotCase(Class<?> caseValue, Object switchValue)`
  `static boolean`
  `isNotCase(Number caseValue, Number switchValue)`
  `static boolean`
  `isNotCase(Object caseValue, Object switchValue)`
  `static boolean`
  `isNotCase(Collection<?> caseValue, Object switchValue)`
  `static boolean`
  `isNotCase(Map<?,?> caseValue, Object switchValue)`
  `static boolean`
  `isUpperCase(Character self)`
  Determine if a Character is uppercase.
  `static boolean`
  `isWhitespace(Character self)`
  Determines if a character is a whitespace character.
  `static Iterator`
  `iterator(Object o)`
  Attempts to create an Iterator for the given object by first converting it to a Collection.
  `static <T> Iterator<T>`
  `iterator(Enumeration<T> enumeration)`
  Allows an Enumeration to behave like an Iterator.
  `static <T> Iterator<T>`
  `iterator(Iterator<T> self)`
  An identity function for iterators, supporting 'duck-typing' when trying to get an iterator for each object within a collection, some of which may already be iterators.
  `static <T> Iterator<T>`
  `iterator(T[] a)`
  Attempts to create an Iterator for the given object by first converting it to a Collection.
  `static String`
  `join(boolean[] self, String separator)`
  Concatenates the string representation of each item in this array, with the given String as a separator between each item.
  `static String`
  `join(byte[] self, String separator)`
  Concatenates the string representation of each item in this array, with the given String as a separator between each item.
  `static String`
  `join(char[] self, String separator)`
  Concatenates the string representation of each item in this array, with the given String as a separator between each item.
  `static String`
  `join(double[] self, String separator)`
  Concatenates the string representation of each item in this array, with the given String as a separator between each item.
  `static String`
  `join(float[] self, String separator)`
  Concatenates the string representation of each item in this array, with the given String as a separator between each item.
  `static String`
  `join(int[] self, String separator)`
  Concatenates the string representation of each item in this array, with the given String as a separator between each item.
  `static String`
  `join(long[] self, String separator)`
  Concatenates the string representation of each item in this array, with the given String as a separator between each item.
  `static String`
  `join(short[] self, String separator)`
  Concatenates the string representation of each item in this array, with the given String as a separator between each item.
  `static String`
  `join(Iterable<?> self, String separator)`
  Concatenates the `toString()` representation of each item in this Iterable, with the given String as a separator between each item.
  `static String`
  `join(Iterator<?> self, String separator)`
  Concatenates the `toString()` representation of each item from the iterator, with the given String as a separator between each item.
  `static <T> String`
  `join(T[] self, String separator)`
  Concatenates the `toString()` representation of each item in this array, with the given String as a separator between each item.
  `static <T> T`
  `last(Iterable<T> self)`
  Returns the last item from the Iterable.
  `static <T> T`
  `last(Deque<T> self)`
  An optimized version of `last(List)`.
  `static <T> T`
  `last(List<T> self)`
  Returns the last item from the List.
  `static <T> T`
  `last(T[] self)`
  Returns the last item from the array.
  `static Number`
  `leftShift(Number self, Number operand)`
  Implementation of the left shift operator for integral types.
  `static <T> Collection<T>`
  `leftShift(Collection<T> self, T value)`
  Overloads the left shift operator to provide an easy way to append objects to a Collection.
  `static <T> BlockingQueue<T>`
  `leftShift(BlockingQueue<T> self, T value)`
  Overloads the left shift operator to provide an easy way to append objects to a BlockingQueue.
  `static <T> List<T>`
  `leftShift(List<T> self, T value)`
  Overloads the left shift operator to provide an easy way to append objects to a List.
  `static <K, V> Map<K,V>`
  `leftShift(Map<K,V> self, Map.Entry<K,V> entry)`
  Overloads the left shift operator to provide an easy way to append Map.Entry values to a Map.
  `static <K, V> Map<K,V>`
  `leftShift(Map<K,V> self, Map<K,V> other)`
  Overloads the left shift operator to provide an easy way to put one maps entries into another map.
  `static <T> Set<T>`
  `leftShift(Set<T> self, T value)`
  Overloads the left shift operator to provide an easy way to append objects to a Set.
  `static <T> SortedSet<T>`
  `leftShift(SortedSet<T> self, T value)`
  Overloads the left shift operator to provide an easy way to append objects to a SortedSet.
  `static double`
  `max(double[] self)`
  Adds max() method to double arrays.
  `static int`
  `max(int[] self)`
  Adds max() method to int arrays.
  `static long`
  `max(long[] self)`
  Adds max() method to long arrays.
  `static <T> T`
  `max(Iterable<T> self)`
  Adds max() method to Iterable objects.
  `static <T> T`
  `max(Iterable<T> self, Closure closure)`
  Selects the item in the iterable which when passed as a parameter to the supplied closure returns the maximum value.
  `static <T> T`
  `max(Iterable<T> self, Comparator<? super T> comparator)`
  Selects the maximum value found in the Iterable using the given comparator.
  `static <T> T`
  `max(Iterator<T> self)`
  Adds max() method to Iterator objects.
  `static <T> T`
  `max(Iterator<T> self, Closure closure)`
  Selects the maximum value found from the Iterator using the closure to determine the correct ordering.
  `static <T> T`
  `max(Iterator<T> self, Comparator<? super T> comparator)`
  Selects the maximum value found from the Iterator using the given comparator.
  `static <K, V> Map.Entry<K,V>`
  `max(Map<K,V> self, Closure closure)`
  Selects an entry in the map having the maximum calculated value as determined by the supplied closure.
  `static <T> T`
  `max(T[] self)`
  Adds max() method to Object arrays.
  `static <T> T`
  `max(T[] self, Closure closure)`
  Selects the maximum value found from the Object array using the closure to determine the correct ordering.
  `static <T> T`
  `max(T[] self, Comparator<? super T> comparator)`
  Selects the maximum value found from the Object array using the given comparator.
  `static MetaClass`
  `metaClass(Class self, Closure closure)`
  Sets/updates the metaclass for a given class to a closure.
  `static MetaClass`
  `metaClass(Object self, Closure closure)`
  Sets/updates the metaclass for a given object to a closure.
  `static double`
  `min(double[] self)`
  Adds min() method to double arrays.
  `static int`
  `min(int[] self)`
  Adds min() method to int arrays.
  `static long`
  `min(long[] self)`
  Adds min() method to long arrays.
  `static <T> T`
  `min(Iterable<T> self)`
  Adds min() method to Collection objects.
  `static <T> T`
  `min(Iterable<T> self, Closure closure)`
  Selects the item in the iterable which when passed as a parameter to the supplied closure returns the minimum value.
  `static <T> T`
  `min(Iterable<T> self, Comparator<? super T> comparator)`
  Selects the minimum value found in the Iterable using the given comparator.
  `static <T> T`
  `min(Iterator<T> self)`
  Adds min() method to Iterator objects.
  `static <T> T`
  `min(Iterator<T> self, Closure closure)`
  Selects the minimum value found from the Iterator using the closure to determine the correct ordering.
  `static <T> T`
  `min(Iterator<T> self, Comparator<? super T> comparator)`
  Selects the minimum value found from the Iterator using the given comparator.
  `static <K, V> Map.Entry<K,V>`
  `min(Map<K,V> self, Closure closure)`
  Selects an entry in the map having the minimum calculated value as determined by the supplied closure.
  `static <T> T`
  `min(T[] self)`
  Adds min() method to Object arrays.
  `static <T> T`
  `min(T[] self, Closure closure)`
  Selects the minimum value found from the Object array using the closure to determine the correct ordering.
  `static <T> T`
  `min(T[] self, Comparator<? super T> comparator)`
  Selects the minimum value found from the Object array using the given comparator.
  `static Number`
  `minus(Character left, Character right)`
  Subtract one Character from another.
  `static Number`
  `minus(Character left, Number right)`
  Subtract a Number from a Character.
  `static <T> Collection<T>`
  `minus(Iterable<T> self, Iterable<?> removeMe)`
  Create a new Collection composed of the elements of the first Iterable minus every occurrence of elements of the given Iterable.
  `static <T> Collection<T>`
  `minus(Iterable<T> self, Iterable<?> removeMe, Closure condition)`
  Create a new Collection composed of the elements of the first Iterable minus every matching occurrence as determined by the condition closure of elements of the given Iterable.
  `static <T> Collection<T>`
  `minus(Iterable<T> self, Iterable<?> removeMe, Comparator<? super T> comparator)`
  Create a new Collection composed of the elements of the first Iterable minus every matching occurrence as determined by the condition comparator of elements of the given Iterable.
  `static <T> Collection<T>`
  `minus(Iterable<T> self, Object removeMe)`
  Create a new Collection composed of the elements of the first Iterable minus every occurrence of the given element to remove.
  `static Number`
  `minus(Number left, Character right)`
  Subtract a Character from a Number.
  `static <T> Collection<T>`
  `minus(Collection<T> self, Collection<?> removeMe)`
  Create a new Collection composed of the elements of the first Collection minus every occurrence of elements of the given Collection.
  `static <T> List<T>`
  `minus(List<T> self, Iterable<?> removeMe)`
  Create a new List composed of the elements of the first List minus every occurrence of elements of the given Iterable.
  `static <T> List<T>`
  `minus(List<T> self, Object removeMe)`
  Create a new List composed of the elements of the first List minus every occurrence of the given element to remove.
  `static <T> List<T>`
  `minus(List<T> self, Collection<?> removeMe)`
  Create a List composed of the elements of the first list minus every occurrence of elements of the given Collection.
  `static <K, V> Map<K,V>`
  `minus(Map<K,V> self, Map removeMe)`
  Create a Map composed of the entries of the first map minus the entries of the given map.
  `static <T> Set<T>`
  `minus(Set<T> self, Iterable<?> removeMe)`
  Create a Set composed of the elements of the first Set minus the elements from the given Iterable.
  `static <T> Set<T>`
  `minus(Set<T> self, Object removeMe)`
  Create a Set composed of the elements of the first Set minus the given element.
  `static <T> Set<T>`
  `minus(Set<T> self, Collection<?> removeMe)`
  Create a Set composed of the elements of the first Set minus the elements of the given Collection.
  `static <T> SortedSet<T>`
  `minus(SortedSet<T> self, Iterable<?> removeMe)`
  Create a SortedSet composed of the elements of the first SortedSet minus the elements of the given Iterable.
  `static <T> SortedSet<T>`
  `minus(SortedSet<T> self, Object removeMe)`
  Create a SortedSet composed of the elements of the first SortedSet minus the given element.
  `static <T> SortedSet<T>`
  `minus(SortedSet<T> self, Collection<?> removeMe)`
  Create a SortedSet composed of the elements of the first SortedSet minus the elements of the given Collection.
  `static <T> T[]`
  `minus(T[] self, Iterable removeMe)`
  Create a new array composed of the elements of the first array minus the elements of the given Iterable.
  `static <T> T[]`
  `minus(T[] self, Object removeMe)`
  Create a new array composed of the elements of the given array minus every occurrence the given object.
  `static <T> T[]`
  `minus(T[] self, Object[] removeMe)`
  Create a new array composed of the elements of the first array minus the elements of the given array.
  `static void`
  `mixin(MetaClass self, Class categoryClass)`
  Extend class globally with category methods.
  `static void`
  `mixin(MetaClass self, Class[] categoryClass)`
  Extend class globally with category methods.
  `static void`
  `mixin(MetaClass self, List<Class> categoryClasses)`
  Extend object with category methods.
  `static void`
  `mixin(Class self, Class categoryClass)`
  Extend class globally with category methods.
  `static void`
  `mixin(Class self, Class[] categoryClass)`
  Extend class globally with category methods.
  `static void`
  `mixin(Class self, List<Class> categoryClasses)`
  Extend class globally with category methods.
  `static Number`
  `mod(Number left, Number right)`
  Performs a division modulus operation.
  `static Number`
  `multiply(Character left, Character right)`
  Multiply two Characters.
  `static Number`
  `multiply(Character left, Number right)`
  Multiply a Character by a Number.
  `static <T> Collection<T>`
  `multiply(Iterable<T> self, Number factor)`
  Create a Collection composed of the elements of this Iterable, repeated a certain number of times.
  `static Number`
  `multiply(Number left, Character right)`
  Multiply a Number by a Character.
  `static Number`
  `multiply(BigDecimal left, Double right)`
  Multiply a BigDecimal and a Double.
  `static Number`
  `multiply(BigDecimal left, BigInteger right)`
  Multiply a BigDecimal and a BigInteger.
  `static <T> List<T>`
  `multiply(List<T> self, Number factor)`
  Create a List composed of the elements of this Iterable, repeated a certain number of times.
  `static <T> T`
  `newInstance(Class<T> c)`
  Convenience method to dynamically create a new instance of this class.
  `static <T> T`
  `newInstance(Class<T> c, Object[] args)`
  Helper to construct a new instance from the given arguments.
  `static Character`
  `next(Character self)`
  Increment a Character by one.
  `static Number`
  `next(Number self)`
  Increment a Number by one.
  `static int`
  `numberAwareCompareTo(Comparable self, Comparable other)`
  Provides a method that compares two comparables using Groovy's default number aware comparator.
  `static Boolean`
  `or(Boolean left, Boolean right)`
  Logical disjunction of two boolean operators
  `static Number`
  `or(Number left, Number right)`
  Bitwise OR together two numbers.
  `static BitSet`
  `or(BitSet left, BitSet right)`
  Bitwise OR together two BitSets.
  `static <T> Set<List<T>>`
  `permutations(Iterable<T> self)`
  Finds all permutations of an iterable.
  `static <T, V> List<V>`
  `permutations(Iterable<T> self, Closure<V> function)`
  Finds all permutations of an iterable, applies a function to each permutation and collects the result into a list.
  `static Number`
  `plus(Character left, Character right)`
  Add one Character to another.
  `static Number`
  `plus(Character left, Number right)`
  Add a Character and a Number.
  `static <T> Collection<T>`
  `plus(Iterable<T> left, Iterable<T> right)`
  Create a Collection as a union of two iterables.
  `static <T> Collection<T>`
  `plus(Iterable<T> left, T right)`
  Create a collection as a union of an Iterable and an Object.
  `static Number`
  `plus(Number left, Character right)`
  Add a Number and a Character.
  `static <T> Collection<T>`
  `plus(Collection<T> left, Iterable<T> right)`
  Create a Collection as a union of a Collection and an Iterable.
  `static <T> Collection<T>`
  `plus(Collection<T> left, Collection<T> right)`
  Create a Collection as a union of two collections.
  `static <T> Collection<T>`
  `plus(Collection<T> left, T right)`
  Create a collection as a union of a Collection and an Object.
  `static <T> List<T>`
  `plus(List<T> self, int index, Iterable<T> additions)`
  Creates a new List by inserting all the elements in the given Iterable to the elements from this List at the specified index.
  `static <T> List<T>`
  `plus(List<T> self, int index, List<T> additions)`
  Creates a new List by inserting all the elements in the given additions List to the elements from the original List at the specified index.
  `static <T> List<T>`
  `plus(List<T> self, int index, T[] items)`
  Creates a new List by inserting all the elements in the specified array to the elements from the original List at the specified index.
  `static <T> List<T>`
  `plus(List<T> left, Iterable<T> right)`
  Create a List as a union of a List and an Iterable.
  `static <T> List<T>`
  `plus(List<T> left, Collection<T> right)`
  Create a List as a union of a List and a Collection.
  `static <T> List<T>`
  `plus(List<T> left, T right)`
  Create a List as a union of a List and an Object.
  `static <K, V> Map<K,V>`
  `plus(Map<K,V> self, Collection<? extends Map.Entry<? extends K,? extends V>> entries)`
  Returns a new `Map` containing all entries from `self` and `entries`, giving precedence to `entries`.
  `static <K, V> Map<K,V>`
  `plus(Map<K,V> left, Map<K,V> right)`
  Returns a new `Map` containing all entries from `left` and `right`, giving precedence to `right`.
  `static String`
  `plus(Map left, GString right)`
  Appends a GString to the literal of the Map instance.
  `static String`
  `plus(Map left, String right)`
  Appends a String to the literal of the Map instance.
  `static <T> Set<T>`
  `plus(Set<T> left, Iterable<T> right)`
  Create a Set as a union of a Set and an Iterable.
  `static <T> Set<T>`
  `plus(Set<T> left, Collection<T> right)`
  Create a Set as a union of a Set and a Collection.
  `static <T> Set<T>`
  `plus(Set<T> left, T right)`
  Create a Set as a union of a Set and an Object.
  `static <T> SortedSet<T>`
  `plus(SortedSet<T> left, Iterable<T> right)`
  Create a SortedSet as a union of a SortedSet and an Iterable.
  `static <T> SortedSet<T>`
  `plus(SortedSet<T> left, Collection<T> right)`
  Create a SortedSet as a union of a SortedSet and a Collection.
  `static <T> SortedSet<T>`
  `plus(SortedSet<T> left, T right)`
  Create a SortedSet as a union of a SortedSet and an Object.
  `static <T> T[]`
  `plus(T[] left, Iterable<?> right)`
  Create an array containing elements from an original array plus those from an Iterable.
  `static <T> T[]`
  `plus(T[] left, Object right)`
  Create an array containing elements from an original array plus an additional appended element.
  `static <T> T[]`
  `plus(T[] left, Object[] right)`
  Create an array as a union of two arrays.
  `static <T> T[]`
  `plus(T[] left, Collection<?> right)`
  Create an array containing elements from an original array plus those from a Collection.
  `static <T> T`
  `pop(List<T> self)`
  Removes the initial item from the List.
  `static Number`
  `power(Integer self, Integer exponent)`
  Power of an integer to an integer certain exponent.
  `static Number`
  `power(Long self, Integer exponent)`
  Power of a long to an integer certain exponent.
  `static Number`
  `power(Number self, Number exponent)`
  Power of a Number to a certain exponent.
  `static Number`
  `power(BigDecimal self, Integer exponent)`
  Power of a BigDecimal to an integer certain exponent.
  `static Number`
  `power(BigInteger self, Integer exponent)`
  Power of a BigInteger to an integer certain exponent.
  `static BigInteger`
  `power(BigInteger self, BigInteger exponent)`
  Power of a BigInteger to a BigInteger certain exponent.
  `static Character`
  `previous(Character self)`
  Decrement a Character by one.
  `static Number`
  `previous(Number self)`
  Decrement a Number by one.
  `protected static Object`
  `primitiveArrayGet(Object self, int idx)`
  Implements the getAt(int) method for primitive type arrays.
  `protected static List`
  `primitiveArrayGet(Object self, Range range)`
  Implements the getAt(Range) method for primitive type arrays.
  `protected static List`
  `primitiveArrayGet(Object self, Collection indices)`
  Implements the getAt(Collection) method for primitive type arrays.
  `protected static Object`
  `primitiveArrayPut(Object self, int idx, Object newValue)`
  Implements the setAt(int idx) method for primitive type arrays.
  `static void`
  `print(Closure self, Object value)`
  Print a value to the standard output stream.
  `static void`
  `print(PrintStream self, Object value)`
  Print a value formatted Groovy style to the print stream.
  `static void`
  `print(PrintWriter self, Object value)`
  Print a value formatted Groovy style to the print writer.
  `static void`
  `print(Object self, PrintWriter out)`
  Print to a console in interactive format.
  `static void`
  `print(Object self, Object value)`
  Print a value formatted Groovy style to self if it is a Writer, otherwise to the standard output stream.
  `static void`
  `printf(Closure self, String format, Object value)`
  Printf a value to the standard output stream using a format string.
  `static void`
  `printf(Closure self, String format, Object[] values)`
  Printf 0 or more values to the standard output stream using a format string.
  `static void`
  `printf(Object self, String format, Object arg)`
  Prints a formatted string using the specified format string and arguments.
  `static void`
  `printf(Object self, String format, Object[] values)`
  Printf to the standard output stream.
  `static void`
  `println(Closure self)`
  Print a linebreak to the standard output stream.
  `static void`
  `println(Closure self, Object value)`
  Print a value (followed by a newline) to the standard output stream.
  `static void`
  `println(PrintStream self, Object value)`
  Print a value formatted Groovy style (followed by a newline) to the print stream.
  `static void`
  `println(PrintWriter self, Object value)`
  Print a value formatted Groovy style (followed by a newline) to the print writer.
  `static void`
  `println(Object self)`
  Print a linebreak to the standard output stream.
  `static void`
  `println(Object self, PrintWriter out)`
  Print to a console in interactive format.
  `static void`
  `println(Object self, Object value)`
  Print a value formatted Groovy style (followed by a newline) to self if it is a Writer, otherwise to the standard output stream.
  `static <T> boolean`
  `push(List<T> self, T value)`
  Prepends an item to the start of the List.
  `static <K, V> Map<K,V>`
  `putAll(Map<K,V> self, Collection<? extends Map.Entry<? extends K,? extends V>> entries)`
  Provides an easy way to append multiple Map.Entry values to a Map.
  `static void`
  `putAt(Object self, String property, Object newValue)`
  Allows the subscript operator to be used to set dynamically named property values.
  `static void`
  `putAt(BitSet self, int index, boolean value)`
  Support subscript-style assignment for a BitSet.
  `static void`
  `putAt(BitSet self, IntRange range, boolean value)`
  Support assigning a range of values with a single assignment statement.
  `static <T> void`
  `putAt(List<T> self, int idx, T value)`
  A helper method to allow lists to work with subscript operators.
  `static <T> void`
  `putAt(List<T> self, Number idx, T value)`
  Support subscript operator for list modification.
  `static void`
  `putAt(List self, EmptyRange range, Object value)`
  A helper method to allow lists to work with subscript operators.
  `static void`
  `putAt(List self, EmptyRange range, Collection value)`
  A helper method to allow lists to work with subscript operators.
  `static void`
  `putAt(List self, IntRange range, Object value)`
  List subscript assignment operator when given a range as the index.
  `static void`
  `putAt(List self, IntRange range, Collection col)`
  List subscript assignment operator when given a range as the index and the assignment operand is a collection.
  `static void`
  `putAt(List self, List splice, Object value)`
  A helper method to allow lists to work with subscript operators.
  `static void`
  `putAt(List self, List splice, List values)`
  A helper method to allow lists to work with subscript operators.
  `static <K, V> V`
  `putAt(Map<K,V> self, K key, V value)`
  A helper method to allow maps to work with subscript operators
  `static <T> boolean`
  `removeAll(Collection<T> self, Closure condition)`
  Modifies this collection by removing the elements that are matched according to the specified closure condition.
  `static boolean`
  `removeAll(Collection self, Object[] items)`
  Modifies this collection by removing its elements that are contained within the specified object array.
  `static <K, V> boolean`
  `removeAll(Map<K,V> self, Closure condition)`
  Modifies this map by removing the elements that are matched according to the specified closure condition.
  `static <E> E`
  `removeAt(List<E> self, int index)`
  Modifies this list by removing the element at the specified position in this list.
  `static <E> boolean`
  `removeElement(Collection<E> self, Object o)`
  Modifies this collection by removing a single instance of the specified element from this collection, if it is present.
  `static <T> T`
  `removeLast(List<T> self)`
  Removes the last item from the List.
  `static List<MetaMethod>`
  `respondsTo(Object self, String name)`
  Returns an object satisfying Groovy truth if the implementing MetaClass responds to a method with the given name regardless of the arguments.
  `static List<MetaMethod>`
  `respondsTo(Object self, String name, Object[] argTypes)`
  Returns an object satisfying Groovy truth if the implementing MetaClass responds to a method with the given name and arguments types.
  `static <T> boolean`
  `retainAll(Collection<T> self, Closure condition)`
  Modifies this collection so that it retains only its elements that are matched according to the specified closure condition.
  `static boolean`
  `retainAll(Collection self, Object[] items)`
  Modifies this collection so that it retains only its elements that are contained in the specified array.
  `static <K, V> boolean`
  `retainAll(Map<K,V> self, Closure condition)`
  Modifies this map so that it retains only its elements that are matched according to the specified closure condition.
  `static <T> Iterator<T>`
  `reverse(Iterator<T> self)`
  Reverses the iterator.
  `static <T> List<T>`
  `reverse(List<T> self)`
  Creates a new List with the identical contents to this list but in reverse order.
  `static <T> List<T>`
  `reverse(List<T> self, boolean mutate)`
  Reverses the elements in a list.
  `static <T> T[]`
  `reverse(T[] self)`
  Creates a new array containing items which are the same as this array but in reverse order.
  `static <T> T[]`
  `reverse(T[] self, boolean mutate)`
  Reverse the items in an array.
  `static <T> List<T>`
  `reverseEach(List<T> self, Closure closure)`
  Iterate over each element of the list in the reverse order.
  `static <K, V> Map<K,V>`
  `reverseEach(Map<K,V> self, Closure<?> closure)`
  Allows a Map to be iterated through in reverse order using a closure.
  `static <T> NavigableSet<T>`
  `reverseEach(NavigableSet<T> self, Closure closure)`
  Iterate over each element of the set in reverse order.
  `static <T> T[]`
  `reverseEach(T[] self, Closure closure)`
  Iterate over each element of the array in the reverse order.
  `static Number`
  `rightShift(Number self, Number operand)`
  Implementation of the right shift operator for integral types.
  `static Number`
  `rightShiftUnsigned(Number self, Number operand)`
  Implementation of the right shift (unsigned) operator for integral types.
  `static long`
  `round(Double number)`
  Round the value
  `static double`
  `round(Double number, int precision)`
  Round the value
  `static int`
  `round(Float number)`
  Round the value
  `static float`
  `round(Float number, int precision)`
  Round the value
  `static BigDecimal`
  `round(BigDecimal number)`
  Round the value
  `static BigDecimal`
  `round(BigDecimal number, int precision)`
  Round the value
  `static TimerTask`
  `runAfter(Timer timer, int delay, Closure closure)`
  Allows a simple syntax for using timers.
  `static void`
  `setMetaClass(GroovyObject self, MetaClass metaClass)`
  Sets the metaclass for a `GroovyObject`.
  `static void`
  `setMetaClass(Class self, MetaClass metaClass)`
  Sets the metaclass for a given class.
  `static void`
  `setMetaClass(Object self, MetaClass metaClass)`
  Sets the metaclass for an object.
  `static void`
  `shuffle(List<?> self)`
  Randomly reorders the elements of the specified list.
  `static void`
  `shuffle(List<?> self, Random rnd)`
  Randomly reorders the elements of the specified list using the specified random instance as the source of randomness.
  `static <T> void`
  `shuffle(T[] self)`
  Randomly reorders the elements of the specified array.
  `static <T> void`
  `shuffle(T[] self, Random rnd)`
  Randomly reorders the elements of the specified array using the specified random instance as the source of randomness.
  `static <T> List<T>`
  `shuffled(List<T> self)`
  Creates a new list containing the elements of the specified list but in a random order.
  `static <T> List<T>`
  `shuffled(List<T> self, Random rnd)`
  Creates a new list containing the elements of the specified list but in a random order using the specified random instance as the source of randomness.
  `static <T> T[]`
  `shuffled(T[] self)`
  Creates a new array containing the elements of the specified array but in a random order.
  `static <T> T[]`
  `shuffled(T[] self, Random rnd)`
  Creates a new array containing the elements of the specified array but in a random order using the specified random instance as the source of randomness.
  `static int`
  `size(boolean[] array)`
  Allows arrays to behave similar to collections.
  `static int`
  `size(byte[] array)`
  Allows arrays to behave similar to collections.
  `static int`
  `size(char[] array)`
  Allows arrays to behave similar to collections.
  `static int`
  `size(double[] array)`
  Allows arrays to behave similar to collections.
  `static int`
  `size(float[] array)`
  Allows arrays to behave similar to collections.
  `static int`
  `size(int[] array)`
  Allows arrays to behave similar to collections.
  `static int`
  `size(long[] array)`
  Allows arrays to behave similar to collections.
  `static int`
  `size(short[] array)`
  Allows arrays to behave similar to collections.
  `static int`
  `size(Iterable self)`
  Provide the standard Groovy `size()` method for `Iterable`.
  `static int`
  `size(Object[] self)`
  Provide the standard Groovy `size()` method for an array.
  `static int`
  `size(Iterator self)`
  Provide the standard Groovy `size()` method for `Iterator`.
  `static <T> List<T>`
  `sort(Iterable<T> self)`
  Sorts the Collection.
  `static <T> List<T>`
  `sort(Iterable<T> self, boolean mutate)`
  Sorts the Iterable.
  `static <T> List<T>`
  `sort(Iterable<T> self, boolean mutate, Closure closure)`
  Sorts this Iterable using the given Closure to determine the correct ordering.
  `static <T> List<T>`
  `sort(Iterable<T> self, boolean mutate, Comparator<? super T> comparator)`
  Sorts the Iterable using the given Comparator.
  `static <T> List<T>`
  `sort(Iterable<T> self, Closure closure)`
  Sorts this Iterable using the given Closure to determine the correct ordering.
  `static <T> Iterator<T>`
  `sort(Iterator<T> self)`
  Sorts the given iterator items into a sorted iterator.
  `static <T> Iterator<T>`
  `sort(Iterator<T> self, Closure closure)`
  Sorts the given iterator items into a sorted iterator using the Closure to determine the correct ordering.
  `static <T> Iterator<T>`
  `sort(Iterator<T> self, Comparator<? super T> comparator)`
  Sorts the given iterator items into a sorted iterator using the comparator.
  `static <K, V> Map<K,V>`
  `sort(Map<K,V> self)`
  Sorts the elements from the given map into a new ordered Map using the natural ordering of the keys to determine the ordering.
  `static <K, V> Map<K,V>`
  `sort(Map<K,V> self, Closure closure)`
  Sorts the elements from the given map into a new ordered map using the closure as a comparator to determine the ordering.
  `static <K, V> Map<K,V>`
  `sort(Map<K,V> self, Comparator<? super K> comparator)`
  Sorts the elements from the given map into a new ordered Map using the specified key comparator to determine the ordering.
  `static <K, V> SortedMap<K,V>`
  `sort(SortedMap<K,V> self)`
  Avoids doing unnecessary work when sorting an already sorted map (i.e.
  `static <T> SortedSet<T>`
  `sort(SortedSet<T> self)`
  Avoids doing unnecessary work when sorting an already sorted set (i.e.
  `static <T> T[]`
  `sort(T[] self)`
  Modifies this array so that its elements are in sorted order.
  `static <T> T[]`
  `sort(T[] self, boolean mutate)`
  Sorts the given array into sorted order.
  `static <T> T[]`
  `sort(T[] self, boolean mutate, Closure closure)`
  Modifies this array so that its elements are in sorted order using the Closure to determine the correct ordering.
  `static <T> T[]`
  `sort(T[] self, boolean mutate, Comparator<? super T> comparator)`
  Modifies this array so that its elements are in sorted order as determined by the given comparator.
  `static <T> T[]`
  `sort(T[] self, Closure closure)`
  Sorts the elements from this array into a newly created array using the Closure to determine the correct ordering.
  `static <T> T[]`
  `sort(T[] self, Comparator<? super T> comparator)`
  Sorts the given array into sorted order using the given comparator.
  `static Collection`
  `split(Object self, Closure closure)`
  Splits all items into two lists based on the closure condition.
  `static <T> Collection<Collection<T>>`
  `split(Collection<T> self, Closure closure)`
  Splits all items into two collections based on the closure condition.
  `static <T> List<List<T>>`
  `split(List<T> self, Closure closure)`
  Splits all items into two collections based on the closure condition.
  `static <T> List<Set<T>>`
  `split(Set<T> self, Closure closure)`
  Splits all items into two collections based on the closure condition.
  `static <T> Collection<Collection<T>>`
  `split(T[] self, Closure closure)`
  Splits all items into two collections based on the closure condition.
  `static SpreadMap`
  `spread(Map self)`
  Synonym for `toSpreadMap(java.util.Map)`.
  `static String`
  `sprintf(Object self, String format, Object arg)`
  Returns a formatted string using the specified format string and arguments.
  `static String`
  `sprintf(Object self, String format, Object[] values)`
  Sprintf to a string.
  `static void`
  `step(Number self, Number to, Number stepNumber, Closure closure)`
  Iterates from this number up to the given number using a step increment.
  `static <K, V> Map<K,V>`
  `subMap(Map<K,V> map, Collection<K> keys)`
  Creates a sub-Map containing the given keys.
  `static <K, V> Map<K,V>`
  `subMap(Map<K,V> map, K[] keys)`
  Creates a sub-Map containing the given keys.
  `static <T> Set<List<T>>`
  `subsequences(List<T> self)`
  Finds all non-null subsequences of a list.
  `static byte`
  `sum(byte[] self)`
  Sums the items in an array.
  `static byte`
  `sum(byte[] self, byte initialValue)`
  Sums the items in an array, adding the result to some initial value.
  `static char`
  `sum(char[] self)`
  Sums the items in an array.
  `static char`
  `sum(char[] self, char initialValue)`
  Sums the items in an array, adding the result to some initial value.
  `static double`
  `sum(double[] self)`
  Sums the items in an array.
  `static double`
  `sum(double[] self, double initialValue)`
  Sums the items in an array, adding the result to some initial value.
  `static float`
  `sum(float[] self)`
  Sums the items in an array.
  `static float`
  `sum(float[] self, float initialValue)`
  Sums the items in an array, adding the result to some initial value.
  `static int`
  `sum(int[] self)`
  Sums the items in an array.
  `static int`
  `sum(int[] self, int initialValue)`
  Sums the items in an array, adding the result to some initial value.
  `static long`
  `sum(long[] self)`
  Sums the items in an array.
  `static long`
  `sum(long[] self, long initialValue)`
  Sums the items in an array, adding the result to some initial value.
  `static short`
  `sum(short[] self)`
  Sums the items in an array.
  `static short`
  `sum(short[] self, short initialValue)`
  Sums the items in an array, adding the result to some initial value.
  `static Object`
  `sum(Iterable<?> self)`
  Sums the items in an Iterable.
  `static Object`
  `sum(Iterable<?> self, Object initialValue)`
  Sums the items in an Iterable, adding the result to some initial value.
  `static <T> Object`
  `sum(Iterable<T> self, Closure closure)`
  Sums the result of applying a closure to each item of an Iterable.
  `static <T> Object`
  `sum(Iterable<T> self, Object initialValue, Closure closure)`
  Sums the result of applying a closure to each item of an Iterable to some initial value.
  `static Object`
  `sum(Object[] self)`
  Sums the items in an array.
  `static Object`
  `sum(Object[] self, Object initialValue)`
  Sums the items in an array, adding the result to some initial value.
  `static Object`
  `sum(Iterator<?> self, Object initialValue)`
  Sums the items from an Iterator, adding the result to some initial value.
  `static Object`
  `sum(Iterator<Object> self)`
  Sums the items from an Iterator.
  `static <T> Object`
  `sum(Iterator<T> self, Closure closure)`
  Sums the result of applying a closure to each item returned from an iterator.
  `static <T> Object`
  `sum(Iterator<T> self, Object initialValue, Closure closure)`
  Sums the result of applying a closure to each item of an Iterator to some initial value.
  `static <T> Object`
  `sum(T[] self, Closure closure)`
  Sums the result of applying a closure to each item of an array.
  `static <T> Object`
  `sum(T[] self, Object initialValue, Closure closure)`
  Sums the result of applying a closure to each item of an array to some initial value.
  `static boolean[]`
  `swap(boolean[] self, int i, int j)`
  Swaps two elements at the specified positions.
  `static byte[]`
  `swap(byte[] self, int i, int j)`
  Swaps two elements at the specified positions.
  `static char[]`
  `swap(char[] self, int i, int j)`
  Swaps two elements at the specified positions.
  `static double[]`
  `swap(double[] self, int i, int j)`
  Swaps two elements at the specified positions.
  `static float[]`
  `swap(float[] self, int i, int j)`
  Swaps two elements at the specified positions.
  `static int[]`
  `swap(int[] self, int i, int j)`
  Swaps two elements at the specified positions.
  `static long[]`
  `swap(long[] self, int i, int j)`
  Swaps two elements at the specified positions.
  `static short[]`
  `swap(short[] self, int i, int j)`
  Swaps two elements at the specified positions.
  `static <T> List<T>`
  `swap(List<T> self, int i, int j)`
  Swaps two elements at the specified positions.
  `static <T> T[]`
  `swap(T[] self, int i, int j)`
  Swaps two elements at the specified positions.
  `static <T> Collection<T>`
  `tail(Iterable<T> self)`
  Returns the items from the Iterable excluding the first item.
  `static <T> Iterator<T>`
  `tail(Iterator<T> self)`
  Returns the original iterator after throwing away the first element.
  `static <T> List<T>`
  `tail(List<T> self)`
  Returns the items from the List excluding the first item.
  `static <T> SortedSet<T>`
  `tail(SortedSet<T> self)`
  Returns the items from the SortedSet excluding the first item.
  `static <T> T[]`
  `tail(T[] self)`
  Returns the items from the array excluding the first item.
  `static <T> List<List<T>>`
  `tails(Iterable<T> self)`
  Calculates the tail values of this Iterable: the first value will be this list of all items from the iterable and the final one will be an empty list, with the intervening values the results of successive applications of tail on the items.
  `static <T> Collection<T>`
  `take(Iterable<T> self, int num)`
  Returns the first `num` elements from the head of this Iterable.
  `static <T> Iterator<T>`
  `take(Iterator<T> self, int num)`
  Returns an iterator of up to the first `num` elements from this iterator.
  `static <T> List<T>`
  `take(List<T> self, int num)`
  Returns the first `num` elements from the head of this List.
  `static <K, V> Map<K,V>`
  `take(Map<K,V> self, int num)`
  Returns a new map containing the first `num` elements from the head of this map.
  `static <T> SortedSet<T>`
  `take(SortedSet<T> self, int num)`
  Returns the first `num` elements from the head of this SortedSet.
  `static <T> T[]`
  `take(T[] self, int num)`
  Returns the first `num` elements from the head of this array.
  `static <T> Collection<T>`
  `takeRight(Iterable<T> self, int num)`
  Returns the last `num` elements from the tail of this Iterable.
  `static <T> List<T>`
  `takeRight(List<T> self, int num)`
  Returns the last `num` elements from the tail of this List.
  `static <T> SortedSet<T>`
  `takeRight(SortedSet<T> self, int num)`
  Returns the last `num` elements from the tail of this SortedSet.
  `static <T> T[]`
  `takeRight(T[] self, int num)`
  Returns the last `num` elements from the tail of this array.
  `static <T> Collection<T>`
  `takeWhile(Iterable<T> self, Closure condition)`
  Returns a Collection containing the longest prefix of the elements from this Iterable where each element passed to the given closure evaluates to true.
  `static <T> Iterator<T>`
  `takeWhile(Iterator<T> self, Closure condition)`
  Returns the longest prefix of elements in this iterator where each element passed to the given condition closure evaluates to true.
  `static <T> List<T>`
  `takeWhile(List<T> self, Closure condition)`
  Returns the longest prefix of this list where each element passed to the given closure condition evaluates to true.
  `static <K, V> Map<K,V>`
  `takeWhile(Map<K,V> self, Closure condition)`
  Returns the longest prefix of this Map where each entry (or key/value pair) when passed to the given closure evaluates to true.
  `static <T> SortedSet<T>`
  `takeWhile(SortedSet<T> self, Closure condition)`
  Returns the longest prefix of this SortedSet where each element passed to the given closure condition evaluates to true.
  `static <T> T[]`
  `takeWhile(T[] self, Closure condition)`
  Returns the longest prefix of this array where each element passed to the given closure evaluates to true.
  `static <T, U> U`
  `tap(U self, Closure<T> closure)`
  Allows the closure to be called for the object reference self (similar to `with`) and always returns self.
  `static void`
  `times(Number self, Closure closure)`
  Executes the closure this many times, starting from zero.
  `static String`
  `toArrayString(Object[] self)`
  Returns the string representation of the given array.
  `static BigDecimal`
  `toBigDecimal(Number self)`
  Transform a Number into a BigDecimal
  `static BigInteger`
  `toBigInteger(Number self)`
  Transform this Number into a BigInteger.
  `static Boolean`
  `toBoolean(Boolean self)`
  Identity conversion which returns Boolean.TRUE for a true Boolean and Boolean.FALSE for a false Boolean.
  `static Double`
  `toDouble(Number self)`
  Transform a Number into a Double
  `static Float`
  `toFloat(Number self)`
  Transform a Number into a Float
  `static Integer`
  `toInteger(Number self)`
  Transform a Number into an Integer
  `static List<Boolean>`
  `toList(boolean[] array)`
  Converts this array to a List of the same size, with each element added to the list.
  `static List<Byte>`
  `toList(byte[] array)`
  Converts this array to a List of the same size, with each element added to the list.
  `static List<Character>`
  `toList(char[] array)`
  Converts this array to a List of the same size, with each element added to the list.
  `static List<Double>`
  `toList(double[] array)`
  Converts this array to a List of the same size, with each element added to the list.
  `static List<Float>`
  `toList(float[] array)`
  Converts this array to a List of the same size, with each element added to the list.
  `static List<Integer>`
  `toList(int[] array)`
  Converts this array to a List of the same size, with each element added to the list.
  `static List<Long>`
  `toList(long[] array)`
  Converts this array to a List of the same size, with each element added to the list.
  `static List<Short>`
  `toList(short[] array)`
  Converts this array to a List of the same size, with each element added to the list.
  `static <T> List<T>`
  `toList(Iterable<T> self)`
  Convert an Iterable to a List.
  `static <T> List<T>`
  `toList(Enumeration<T> self)`
  Convert an enumeration to a List.
  `static <T> List<T>`
  `toList(Iterator<T> self)`
  Convert an iterator to a List.
  `static <T> List<T>`
  `toList(T[] array)`
  Allows conversion of arrays into a mutable List.
  `static String`
  `toListString(Collection self)`
  Returns the string representation of the given list.
  `static String`
  `toListString(Collection self, int maxSize)`
  Returns the string representation of the given list.
  `static Long`
  `toLong(Number self)`
  Transform a Number into a Long
  `static char`
  `toLowerCase(Character self)`
  Converts the character to lowercase.
  `static String`
  `toMapString(Map self)`
  Returns the string representation of this map.
  `static String`
  `toMapString(Map self, int maxSize)`
  Returns the string representation of this map.
  `static Set<Boolean>`
  `toSet(boolean[] array)`
  Converts this array to a Set, with each unique element added to the set.
  `static Set<Byte>`
  `toSet(byte[] array)`
  Converts this array to a Set, with each unique element added to the set.
  `static Set<Character>`
  `toSet(char[] array)`
  Converts this array to a Set, with each unique element added to the set.
  `static Set<Double>`
  `toSet(double[] array)`
  Converts this array to a Set, with each unique element added to the set.
  `static Set<Float>`
  `toSet(float[] array)`
  Converts this array to a Set, with each unique element added to the set.
  `static Set<Integer>`
  `toSet(int[] array)`
  Converts this array to a Set, with each unique element added to the set.
  `static Set<Long>`
  `toSet(long[] array)`
  Converts this array to a Set, with each unique element added to the set.
  `static Set<Short>`
  `toSet(short[] array)`
  Converts this array to a Set, with each unique element added to the set.
  `static <T> Set<T>`
  `toSet(Iterable<T> self)`
  Convert an Iterable to a Set.
  `static <T> Set<T>`
  `toSet(Collection<T> self)`
  Convert a Collection to a Set.
  `static <T> Set<T>`
  `toSet(Enumeration<T> self)`
  Convert an enumeration to a Set.
  `static <T> Set<T>`
  `toSet(Iterator<T> self)`
  Convert an iterator to a Set.
  `static <T> List<T>`
  `toSorted(Iterable<T> self)`
  Sorts the Iterable.
  `static <T> List<T>`
  `toSorted(Iterable<T> self, Closure closure)`
  Sorts this Iterable using the given Closure to determine the correct ordering.
  `static <T> List<T>`
  `toSorted(Iterable<T> self, Comparator<? super T> comparator)`
  Sorts the Iterable using the given Comparator.
  `static <T> Iterator<T>`
  `toSorted(Iterator<T> self)`
  Sorts the Iterator.
  `static <T> Iterator<T>`
  `toSorted(Iterator<T> self, Closure closure)`
  Sorts the given iterator items into a sorted iterator using the Closure to determine the correct ordering.
  `static <T> Iterator<T>`
  `toSorted(Iterator<T> self, Comparator<? super T> comparator)`
  Sorts the given iterator items using the comparator.
  `static <K, V> Map<K,V>`
  `toSorted(Map<K,V> self)`
  Sorts the elements from the given map into a new ordered map using a `NumberAwareComparator` on map entry values to determine the resulting order.
  `static <K, V> Map<K,V>`
  `toSorted(Map<K,V> self, Closure condition)`
  Sorts the elements from the given map into a new ordered map using the supplied Closure condition as a comparator to determine the ordering.
  `static <K, V> Map<K,V>`
  `toSorted(Map<K,V> self, Comparator<Map.Entry<K,V>> comparator)`
  Sorts the elements from the given map into a new ordered map using the supplied comparator to determine the ordering.
  `static <K, V> Map<K,V>`
  `toSorted(SortedMap<K,V> self)`
  Avoids doing unnecessary work when sorting an already sorted map
  `static <T> Set<T>`
  `toSorted(SortedSet<T> self)`
  Avoids doing unnecessary work when sorting an already sorted set
  `static <T> T[]`
  `toSorted(T[] self)`
  Returns a sorted version of the given array using the supplied comparator.
  `static <T> T[]`
  `toSorted(T[] self, Closure closure)`
  Sorts the elements from this array into a newly created array using the Closure to determine the correct ordering.
  `static <T> T[]`
  `toSorted(T[] self, Comparator<? super T> comparator)`
  Returns a sorted version of the given array using the supplied comparator to determine the resulting order.
  `static SpreadMap`
  `toSpreadMap(Iterable self)`
  Creates a spreadable map from this iterable.
  `static SpreadMap`
  `toSpreadMap(Object[] self)`
  Creates a spreadable map from this array.
  `static SpreadMap`
  `toSpreadMap(List self)`
  Creates a spreadable map from this list.
  `static SpreadMap`
  `toSpreadMap(Map self)`
  Returns a new `SpreadMap` from this map.
  `static String`
  `toString(boolean[] self)`
  Returns the string representation of the given array.
  `static String`
  `toString(byte[] self)`
  Returns the string representation of the given array.
  `static String`
  `toString(char[] self)`
  Returns the string representation of the given array.
  `static String`
  `toString(double[] self)`
  Returns the string representation of the given array.
  `static String`
  `toString(float[] self)`
  Returns the string representation of the given array.
  `static String`
  `toString(int[] self)`
  Returns the string representation of the given array.
  `static String`
  `toString(long[] self)`
  Returns the string representation of the given array.
  `static String`
  `toString(short[] self)`
  Returns the string representation of the given array.
  `static String`
  `toString(Object value)`
  Create a String representation of this object.
  `static String`
  `toString(Object[] self)`
  Returns the string representation of this array's contents.
  `static String`
  `toString(AbstractCollection self)`
  Returns the string representation of the given collection.
  `static String`
  `toString(AbstractMap self)`
  Returns the string representation of the given map.
  `static <T> Collection<T>`
  `toUnique(Iterable<T> self)`
  Returns a Collection containing the items from the Iterable but with duplicates removed using the natural ordering of the items to determine uniqueness.
  `static <T> Collection<T>`
  `toUnique(Iterable<T> self, Closure condition)`
  Returns a Collection containing the items from the Iterable but with duplicates removed.
  `static <T> Collection<T>`
  `toUnique(Iterable<T> self, Comparator<? super T> comparator)`
  Returns a Collection containing the items from the Iterable but with duplicates removed.
  `static <T> Iterator<T>`
  `toUnique(Iterator<T> self)`
  Returns an iterator equivalent to this iterator with all duplicated items removed by using the natural ordering of the items.
  `static <T> Iterator<T>`
  `toUnique(Iterator<T> self, Closure condition)`
  Returns an iterator equivalent to this iterator but with all duplicated items removed where duplicate (equal) items are deduced by calling the supplied Closure condition.
  `static <T> Iterator<T>`
  `toUnique(Iterator<T> self, Comparator<? super T> comparator)`
  Returns an iterator equivalent to this iterator with all duplicated items removed by using the supplied comparator.
  `static <T> List<T>`
  `toUnique(List<T> self)`
  Returns a List containing the items from the List but with duplicates removed using the natural ordering of the items to determine uniqueness.
  `static <T> List<T>`
  `toUnique(List<T> self, Closure condition)`
  Returns a List containing the items from the List but with duplicates removed.
  `static <T> List<T>`
  `toUnique(List<T> self, Comparator<? super T> comparator)`
  Returns a List containing the items from the List but with duplicates removed.
  `static <T> T[]`
  `toUnique(T[] self)`
  Returns a new Array containing the items from the original Array but with duplicates removed using the natural ordering of the items in the array.
  `static <T> T[]`
  `toUnique(T[] self, Closure condition)`
  Returns a new Array containing the items from the original Array but with duplicates removed with the supplied comparator determining which items are unique.
  `static <T> T[]`
  `toUnique(T[] self, Comparator<? super T> comparator)`
  Returns a new Array containing the items from the original Array but with duplicates removed with the supplied comparator determining which items are unique.
  `static char`
  `toUpperCase(Character self)`
  Converts the character to uppercase.
  `static double[][]`
  `transpose(double[][] self)`
  A transpose method for 2D double arrays.
  `static int[][]`
  `transpose(int[][] self)`
  A transpose method for 2D int arrays.
  `static long[][]`
  `transpose(long[][] self)`
  A transpose method for 2D long arrays.
  `static List`
  `transpose(List self)`
  Adds GroovyCollections#transpose(List) as a method on lists.
  `static double`
  `trunc(Double number)`
  Truncate the value
  `static double`
  `trunc(Double number, int precision)`
  Truncate the value
  `static float`
  `trunc(Float number)`
  Truncate the value
  `static float`
  `trunc(Float number, int precision)`
  Truncate the value
  `static BigDecimal`
  `trunc(BigDecimal number)`
  Truncate the value
  `static BigDecimal`
  `trunc(BigDecimal number, int precision)`
  Truncate the value
  `static Number`
  `unaryMinus(Number left)`
  Negates the number.
  `static Number`
  `unaryPlus(Number left)`
  Returns the number, effectively being a noop for numbers.
  `static Object[]`
  `union(Object[] left, Iterable<?> right)`
  Create an Object array containing elements from an original array plus those from an Iterable.
  `static Object[]`
  `union(Object[] left, Object right)`
  Create an Object array containing elements from an original array plus an additional appended element.
  `static Object[]`
  `union(Object[] left, Object[] right)`
  Create an Object array as a union of two arrays.
  `static Object[]`
  `union(Object[] left, Collection<?> right)`
  Create an object array containing elements from an original array plus those from a Collection.
  `static <T> Collection<T>`
  `unique(Collection<T> self)`
  Modifies this collection to remove all duplicated items, using Groovy's default number-aware comparator.
  `static <T> Collection<T>`
  `unique(Collection<T> self, boolean mutate)`
  Remove all duplicates from a given Collection using Groovy's default number-aware comparator.
  `static <T> Collection<T>`
  `unique(Collection<T> self, boolean mutate, Closure closure)`
  A convenience method for making a collection unique using a Closure to determine duplicate (equal) items.
  `static <T> Collection<T>`
  `unique(Collection<T> self, boolean mutate, Comparator<? super T> comparator)`
  Remove all duplicates from a given Collection.
  `static <T> Collection<T>`
  `unique(Collection<T> self, Closure closure)`
  A convenience method for making a collection unique using a Closure to determine duplicate (equal) items.
  `static <T> Collection<T>`
  `unique(Collection<T> self, Comparator<? super T> comparator)`
  Remove all duplicates from a given Collection.
  `static <T> Iterator<T>`
  `unique(Iterator<T> self)`
  Returns an iterator equivalent to this iterator with all duplicated items removed by using Groovy's default number-aware comparator.
  `static <T> Iterator<T>`
  `unique(Iterator<T> self, Closure condition)`
  Returns an iterator equivalent to this iterator but with all duplicated items removed by using a Closure to determine duplicate (equal) items.
  `static <T> Iterator<T>`
  `unique(Iterator<T> self, Comparator<? super T> comparator)`
  Returns an iterator equivalent to this iterator with all duplicated items removed by using the supplied comparator.
  `static <T> List<T>`
  `unique(List<T> self)`
  Modifies this List to remove all duplicated items, using Groovy's default number-aware comparator.
  `static <T> List<T>`
  `unique(List<T> self, boolean mutate)`
  Remove all duplicates from a given List using Groovy's default number-aware comparator.
  `static <T> List<T>`
  `unique(List<T> self, boolean mutate, Closure closure)`
  A convenience method for making a List unique using a Closure to determine duplicate (equal) items.
  `static <T> List<T>`
  `unique(List<T> self, boolean mutate, Comparator<? super T> comparator)`
  Remove all duplicates from a given List.
  `static <T> List<T>`
  `unique(List<T> self, Closure closure)`
  A convenience method for making a List unique using a Closure to determine duplicate (equal) items.
  `static <T> List<T>`
  `unique(List<T> self, Comparator<? super T> comparator)`
  Remove all duplicates from a given List.
  `static void`
  `upto(double self, Number to, Closure closure)`
  Iterates from this number up to the given number, inclusive, incrementing by one each time.
  `static void`
  `upto(float self, Number to, Closure closure)`
  Iterates from this number up to the given number, inclusive, incrementing by one each time.
  `static void`
  `upto(long self, Number to, Closure closure)`
  Iterates from this number up to the given number, inclusive, incrementing by one each time.
  `static void`
  `upto(Double self, Number to, Closure closure)`
  Iterates from this number up to the given number, inclusive, incrementing by one each time.
  `static void`
  `upto(Float self, Number to, Closure closure)`
  Iterates from this number up to the given number, inclusive, incrementing by one each time.
  `static void`
  `upto(Long self, Number to, Closure closure)`
  Iterates from this number up to the given number, inclusive, incrementing by one each time.
  `static void`
  `upto(Number self, Number to, Closure closure)`
  Iterates from this number up to the given number, inclusive, incrementing by one each time.
  `static void`
  `upto(BigDecimal self, Number to, Closure closure)`
  Iterates from this number up to the given number, inclusive, incrementing by one each time.
  `static void`
  `upto(BigInteger self, Number to, Closure closure)`
  Iterates from this number up to the given number, inclusive, incrementing by one each time.
  `static <T> T`
  `use(Object self, Class categoryClass, Closure<T> closure)`
  Scoped use method
  `static Object`
  `use(Object self, Object[] array)`
  Allows you to use a list of categories, specifying the list as varargs.
  `static <T> T`
  `use(Object self, List<Class> categoryClassList, Closure<T> closure)`
  Scoped use method with list of categories.
  `static <T, U extends T, V extends T>
  T`
  `with(U self, boolean returning, Closure<T> closure)`
  Allows the closure to be called for the object reference self.
  `static <T, U> T`
  `with(U self, Closure<T> closure)`
  Allows the closure to be called for the object reference self.
  `static <T> ListWithDefault<T>`
  `withDefault(List<T> self, Closure<T> init)`
  An alias for `withLazyDefault` which decorates a list allowing it to grow when called with index values outside the normal list bounds.
  `static <K, V> Map<K,V>`
  `withDefault(Map<K,V> self, boolean autoGrow, boolean autoShrink, Closure<V> init)`
  Wraps a map using the decorator pattern with a wrapper that intercepts all calls to `get(key)` and `put(key, value)`.
  `static <K, V> Map<K,V>`
  `withDefault(Map<K,V> self, Closure<V> init)`
  Wraps a map using the decorator pattern with a wrapper that intercepts all calls to `get(key)`.
  `static <T> List<T>`
  `withDefault$$bridge(List<T> self, Closure<T> init)`
  Deprecated.
  `static <T> ListWithDefault<T>`
  `withEagerDefault(List<T> self, Closure<T> init)`
  Decorates a list allowing it to grow when called with a non-existent index value.
  `static <T> List<T>`
  `withEagerDefault$$bridge(List<T> self, Closure<T> init)`
  Deprecated.
  `static <E> List<Tuple2<E,Integer>>`
  `withIndex(Iterable<E> self)`
  Zips an Iterable with indices in (value, index) order.
  `static <E> List<Tuple2<E,Integer>>`
  `withIndex(Iterable<E> self, int offset)`
  Zips an Iterable with indices in (value, index) order.
  `static <E> Iterator<Tuple2<E,Integer>>`
  `withIndex(Iterator<E> self)`
  Zips an iterator with indices in (value, index) order.
  `static <E> Iterator<Tuple2<E,Integer>>`
  `withIndex(Iterator<E> self, int offset)`
  Zips an iterator with indices in (value, index) order.
  `static <T> ListWithDefault<T>`
  `withLazyDefault(List<T> self, Closure<T> init)`
  Decorates a list allowing it to grow when called with a non-existent index value.
  `static <T> List<T>`
  `withLazyDefault$$bridge(List<T> self, Closure<T> init)`
  Deprecated.
  `static Object`
  `withTraits(Object self, Class<?>... traits)`
  Dynamically wraps an instance into something which implements the supplied trait classes.
  `static Boolean`
  `xor(Boolean left, Boolean right)`
  Exclusive disjunction of two boolean operators
  `static Number`
  `xor(Number left, Number right)`
  Bitwise XOR together two Numbers.
  `static BitSet`
  `xor(BitSet left, BitSet right)`
  Bitwise XOR together two BitSets.

  ### Methods inherited from class org.codehaus.groovy.runtime.DefaultGroovyMethodsSupport

  `cloneSimilarCollection, cloneSimilarMap, closeQuietly, closeWithWarning, createSimilarArray, createSimilarCollection, createSimilarCollection, createSimilarCollection, createSimilarList, createSimilarMap, createSimilarOrDefaultCollection, createSimilarQueue, createSimilarSet, normaliseIndex, sameType, subListBorders, subListBorders, subListRange, writeUTF16BomIfRequired, writeUTF16BomIfRequired, writeUTF16BomIfRequired, writeUTF16BomIfRequired`

  ### Methods inherited from class java.lang.Object

  `clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait`

- ## Field Details

  - ### ADDITIONAL_CLASSES

    public static final Class[] ADDITIONAL_CLASSES

  - ### DGM_LIKE_CLASSES

    public static final Class[] DGM_LIKE_CLASSES

- ## Constructor Details

  - ### DefaultGroovyMethods

    public DefaultGroovyMethods()

- ## Method Details

  - ### is

    public static boolean is(Object self, Object other)
    Identity check. Since == is overridden in Groovy with the meaning of equality we need some fallback to check for object identity. Invoke using the 'is' method, like so: `def same = this.is(that)`
    Parameters:
      `self` - an object
      `other` - an object to compare identity with
    Returns:
      true if self and other are both references to the same instance, false otherwise
    Since:
      1.0

  - ### identity

    public static <T, U> T identity(U self, @DelegatesTo(value=Target.class,target="self",strategy=1) Closure<T> closure)
    Allows the closure to be called for the object reference self. Synonym for 'with()'.
    Parameters:
      `self` - the object to have a closure act upon
      `closure` - the closure to call on the object
    Returns:
      result of calling the closure
    Since:
      1.0
    See Also:
      - `with(Object, Closure)`

  - ### with

    public static <T, U> T with(U self, @DelegatesTo(value=Target.class,target="self",strategy=1) Closure<T> closure)
    Allows the closure to be called for the object reference self.

    Any method invoked inside the closure will first be invoked on the self reference. For instance, the following method calls to the append() method are invoked on the StringBuilder instance:

         def b = new StringBuilder().with {
           append('foo')
           append('bar')
           return it
         }
         assert b.toString() == 'foobar'

    This is commonly used to simplify object creation, such as this example:

         def p = new Person().with {
           firstName = 'John'
           lastName = 'Doe'
           return it
         }

    The other typical usage, uses the self object while creating some value:

         def fullName = person.with{ "$firstName $lastName" }

    Parameters:
      `self` - the object to have a closure act upon
      `closure` - the closure to call on the object
    Returns:
      result of calling the closure
    Since:
      1.5.0
    See Also:
      - `with(Object, boolean, Closure)`
      - `tap(Object, Closure)`

  - ### with

    public static <T, U extends T, V extends T> T with(U self, boolean returning, @DelegatesTo(value=Target.class,target="self",strategy=1) Closure<T> closure)
    Allows the closure to be called for the object reference self.

    Any method invoked inside the closure will first be invoked on the self reference. For example, the following method calls to the append() method are invoked on the StringBuilder instance and then, because 'returning' is true, the self instance is returned:

         def b = new StringBuilder().with(true) {
           append('foo')
           append('bar')
         }
         assert b.toString() == 'foobar'

    The returning parameter is commonly set to true when using with to simplify object creation, such as this example:

         def p = new Person().with(true) {
           firstName = 'John'
           lastName = 'Doe'
         }

    Alternatively, 'tap' is an alias for 'with(true)', so that method can be used instead. The other main use case for with is when returning a value calculated using self as shown here:

         def fullName = person.with(false){ "$firstName $lastName" }

    Alternatively, 'with' is an alias for 'with(false)', so the boolean parameter can be omitted instead.
    Parameters:
      `self` - the object to have a closure act upon
      `returning` - if true, return the self object; otherwise, the result of calling the closure
      `closure` - the closure to call on the object
    Returns:
      the self object or the result of calling the closure depending on 'returning'
    Since:
      2.5.0
    See Also:
      - `with(Object, Closure)`
      - `tap(Object, Closure)`

  - ### tap

    public static <T, U> U tap(U self, @DelegatesTo(value=Target.class,target="self",strategy=1) Closure<T> closure)
    Allows the closure to be called for the object reference self (similar to `with`) and always returns self.

    Any method invoked inside the closure will first be invoked on the self reference. For instance, the following method calls to the append() method are invoked on the StringBuilder instance:

         def b = new StringBuilder().tap {
           append('foo')
           append('bar')
         }
         assert b.toString() == 'foobar'

    This is commonly used to simplify object creation, such as this example:

         def p = new Person().tap {
           firstName = 'John'
           lastName = 'Doe'
         }

    Parameters:
      `self` - the object to have a closure act upon
      `closure` - the closure to call on the object
    Returns:
      self
    Since:
      2.5.0
    See Also:
      - `with(Object, boolean, Closure)`
      - `with(Object, Closure)`

  - ### getAt

    public static Object getAt(Object self, String property)
    Allows the subscript operator to be used to lookup dynamic property values. `bean[somePropertyNameExpression]`. The normal property notation of groovy is neater and more concise but only works with compile-time known property names.
    Parameters:
      `self` - the object to act upon
      `property` - the property name of interest
    Returns:
      the property value
    Since:
      1.0

  - ### putAt

    public static void putAt(Object self, String property, Object newValue)
    Allows the subscript operator to be used to set dynamically named property values. `bean[somePropertyNameExpression] = foo`. The normal property notation of groovy is neater and more concise but only works with property names which are known at compile time.
    Parameters:
      `self` - the object to act upon
      `property` - the name of the property to set
      `newValue` - the value to set
    Since:
      1.0

  - ### dump

    public static String dump(Object self)
    Generates a detailed dump string of an object showing its class, hashCode and all accessible fields.
    Parameters:
      `self` - an object
    Returns:
      the dump representation
    Since:
      1.0

  - ### getMetaPropertyValues

    public static List<PropertyValue> getMetaPropertyValues(Object self)
    Retrieves the list of `MetaProperty` objects for 'self' and wraps it in a list of `PropertyValue` objects that additionally provide the value for each property of 'self'.
    Parameters:
      `self` - the receiver object
    Returns:
      list of `PropertyValue` objects
    Since:
      1.0
    See Also:
      - `Expando.getMetaPropertyValues()`

  - ### getProperties

    public static Map getProperties(Object self)
    Convenience method that calls `getMetaPropertyValues(java.lang.Object)`(self) and provides the data in form of simple key/value pairs, i.e. without type() information.
    Parameters:
      `self` - the receiver object
    Returns:
      meta properties as Map of key/value pairs
    Since:
      1.0

  - ### use

    public static <T> T use(Object self, Class categoryClass, Closure<T> closure)
    Scoped use method
    Parameters:
      `self` - any Object
      `categoryClass` - a category class to use
      `closure` - the closure to invoke with the category in place
    Returns:
      the value returned from the closure
    Since:
      1.0

  - ### mixin

    public static void mixin(MetaClass self, List<Class> categoryClasses)
    Extend object with category methods. All methods for given class and all super classes will be added to the object.
    Parameters:
      `self` - any Class
      `categoryClasses` - a category classes to use
    Since:
      1.6.0

  - ### mixin

    public static void mixin(Class self, List<Class> categoryClasses)
    Extend class globally with category methods. All methods for given class and all super classes will be added to the class.
    Parameters:
      `self` - any Class
      `categoryClasses` - a category classes to use
    Since:
      1.6.0

  - ### mixin

    public static void mixin(Class self, Class categoryClass)
    Extend class globally with category methods.
    Parameters:
      `self` - any Class
      `categoryClass` - a category class to use
    Since:
      1.6.0

  - ### mixin

    public static void mixin(Class self, Class[] categoryClass)
    Extend class globally with category methods.
    Parameters:
      `self` - any Class
      `categoryClass` - a category class to use
    Since:
      1.6.0

  - ### mixin

    public static void mixin(MetaClass self, Class categoryClass)
    Extend class globally with category methods.
    Parameters:
      `self` - any Class
      `categoryClass` - a category class to use
    Since:
      1.6.0

  - ### mixin

    public static void mixin(MetaClass self, Class[] categoryClass)
    Extend class globally with category methods.
    Parameters:
      `self` - any Class
      `categoryClass` - a category class to use
    Since:
      1.6.0

  - ### getLocation

    public static URL getLocation(Class self)
    Gets the url of the jar file/source file containing the specified class
    Parameters:
      `self` - the class
    Returns:
      the url of the jar, `null` if the specified class is from JDK
    Since:
      2.5.0

  - ### addShutdownHook

    public static void addShutdownHook(Object self, Closure closure)
    Allows the usage of addShutdownHook without getting the runtime first.
    Parameters:
      `self` - the object the method is called on (ignored)
      `closure` - the shutdown hook action
    Since:
      1.5.0

  - ### use

    public static <T> T use(Object self, List<Class> categoryClassList, Closure<T> closure)
    Scoped use method with list of categories.
    Parameters:
      `self` - any Object
      `categoryClassList` - a list of category classes
      `closure` - the closure to invoke with the categories in place
    Returns:
      the value returned from the closure
    Since:
      1.0

  - ### use

    public static Object use(Object self, Object[] array)
    Allows you to use a list of categories, specifying the list as varargs. `use(CategoryClass1, CategoryClass2) { ... }` This method saves having to wrap the category classes in a list.
    Parameters:
      `self` - any Object
      `array` - a list of category classes and a Closure
    Returns:
      the value returned from the closure
    Since:
      1.0

  - ### inspect

    public static String inspect(Object self)
    Inspects returns the String that matches what would be typed into a terminal to create this object.
    Parameters:
      `self` - any Object
    Returns:
      a String that matches what would be typed into a terminal to create this object. e.g. [1, 'hello'].inspect() `->` [1, 'hello']
    Since:
      1.0

  - ### invokeMethod

    public static Object invokeMethod(Object object, String method, Object arguments)
    Provide a dynamic method invocation method which can be overloaded in classes to implement dynamic proxies easily.
    Parameters:
      `object` - any Object
      `method` - the name of the method to call
      `arguments` - the arguments to use
    Returns:
      the result of the method call
    Since:
      1.0

  - ### print

    public static void print(Object self, Object value)
    Print a value formatted Groovy style to self if it is a Writer, otherwise to the standard output stream.
    Parameters:
      `self` - any Object
      `value` - the value to print
    Since:
      1.0

  - ### print

    public static void print(PrintWriter self, Object value)
    Print a value formatted Groovy style to the print writer.
    Parameters:
      `self` - a PrintWriter
      `value` - the value to print
    Since:
      1.0

  - ### print

    public static void print(PrintStream self, Object value)
    Print a value formatted Groovy style to the print stream.
    Parameters:
      `self` - a PrintStream
      `value` - the value to print
    Since:
      1.6.0

  - ### print

    public static void print(Closure self, Object value)
    Print a value to the standard output stream. This method delegates to the owner to execute the method.
    Parameters:
      `self` - a generated closure
      `value` - the value to print
    Since:
      1.0

  - ### print

    public static void print(Object self, PrintWriter out)
    Print to a console in interactive format.
    Parameters:
      `self` - any Object
      `out` - the PrintWriter used for printing
    Since:
      1.0

  - ### println

    public static void println(Object self)
    Print a linebreak to the standard output stream.
    Parameters:
      `self` - any Object
    Since:
      1.0

  - ### println

    public static void println(Closure self)
    Print a linebreak to the standard output stream. This method delegates to the owner to execute the method.
    Parameters:
      `self` - a closure
    Since:
      1.0

  - ### println

    public static void println(Object self, Object value)
    Print a value formatted Groovy style (followed by a newline) to self if it is a Writer, otherwise to the standard output stream.
    Parameters:
      `self` - any Object
      `value` - the value to print
    Since:
      1.0

  - ### println

    public static void println(PrintWriter self, Object value)
    Print a value formatted Groovy style (followed by a newline) to the print writer.
    Parameters:
      `self` - a PrintWriter
      `value` - the value to print
    Since:
      1.0

  - ### println

    public static void println(PrintStream self, Object value)
    Print a value formatted Groovy style (followed by a newline) to the print stream.
    Parameters:
      `self` - any Object
      `value` - the value to print
    Since:
      1.6.0

  - ### println

    public static void println(Closure self, Object value)
    Print a value (followed by a newline) to the standard output stream. This method delegates to the owner to execute the method.
    Parameters:
      `self` - a closure
      `value` - the value to print
    Since:
      1.0

  - ### println

    public static void println(Object self, PrintWriter out)
    Print to a console in interactive format.
    Parameters:
      `self` - any Object
      `out` - the PrintWriter used for printing
    Since:
      1.0

  - ### printf

    public static void printf(Object self, String format, Object[] values)
    Printf to the standard output stream.
    Parameters:
      `self` - any Object
      `format` - a format string
      `values` - values referenced by the format specifiers in the format string
    Since:
      1.0

  - ### printf

    public static void printf(Closure self, String format, Object[] values)
    Printf 0 or more values to the standard output stream using a format string. This method delegates to the owner to execute the method.
    Parameters:
      `self` - a generated closure
      `format` - a format string
      `values` - values referenced by the format specifiers in the format string
    Since:
      3.0.0

  - ### printf

    public static void printf(Closure self, String format, Object value)
    Printf a value to the standard output stream using a format string. This method delegates to the owner to execute the method.
    Parameters:
      `self` - a generated closure
      `format` - a format string
      `value` - value referenced by the format specifier in the format string
    Since:
      3.0.0

  - ### printf

    public static void printf(Object self, String format, Object arg)
    Prints a formatted string using the specified format string and arguments.

    Examples:

             printf ( "Hello, %s!\n" , [ "world" ] as String[] )
             printf ( "Hello, %s!\n" , [ "Groovy" ])
             printf ( "%d + %d = %d\n" , [ 1 , 2 , 1+2 ] as Integer[] )
             printf ( "%d + %d = %d\n" , [ 3 , 3 , 3+3 ])

             ( 1..5 ).each { printf ( "-- %d\n" , [ it ] as Integer[] ) }
             ( 1..5 ).each { printf ( "-- %d\n" , [ it ] as int[] ) }
             ( 0x41..0x45 ).each { printf ( "-- %c\n" , [ it ] as char[] ) }
             ( 07..011 ).each { printf ( "-- %d\n" , [ it ] as byte[] ) }
             ( 7..11 ).each { printf ( "-- %d\n" , [ it ] as short[] ) }
             ( 7..11 ).each { printf ( "-- %d\n" , [ it ] as long[] ) }
             ( 7..11 ).each { printf ( "-- %5.2f\n" , [ it ] as float[] ) }
             ( 7..11 ).each { printf ( "-- %5.2g\n" , [ it ] as double[] ) }

    Parameters:
      `self` - any Object
      `format` - A format string
      `arg` - Argument which is referenced by the format specifiers in the format string. The type of `arg` should be one of Object[], List, int[], short[], byte[], char[], boolean[], long[], float[], or double[].
    Since:
      1.0

  - ### sprintf

    public static String sprintf(Object self, String format, Object[] values)
    Sprintf to a string.
    Parameters:
      `self` - any Object
      `format` - a format string
      `values` - values referenced by the format specifiers in the format string
    Returns:
      the resulting formatted string
    Since:
      1.5.0

  - ### sprintf

    public static String sprintf(Object self, String format, Object arg)
    Returns a formatted string using the specified format string and arguments.
    Parameters:
      `self` - any Object
      `format` - A format string
      `arg` - Argument which is referenced by the format specifiers in the format string. The type of `arg` should be one of Object[], List, int[], short[], byte[], char[], boolean[], long[], float[], or double[].
    Returns:
      the resulting printf'd string
    Since:
      1.5.0

  - ### isCase

    public static boolean isCase(Object caseValue, Object switchValue)
    Method for overloading the behavior of the 'case' method in switch statements. The default implementation handles arrays types but otherwise simply delegates to Object#equals, but this may be overridden for other types. In this example:

         switch( a ) {
           case b: //some code
         }

    "some code" is called when `b.isCase( a )` returns `true`.
    Parameters:
      `caseValue` - the case value
      `switchValue` - the switch value
    Returns:
      true if the switchValue is deemed to be equal to the caseValue
    Since:
      1.0

  - ### isCase

    public static boolean isCase(Class caseValue, Object switchValue)
    Special 'Case' implementation for Class, which allows testing whether some switch value is assignable from the given case class. If the switch value is an object, `isCase` will return true if the switch value is assignment compatible with the class (case value), i.e. is an `instanceof` the class, for example:

         def someList = []
         switch (someList) {
           case List:
             assert true : 'is a list'
             break
           case Map:
             assert false : 'is not a Map'
             break
           default:
             assert false : 'should never get here'
             break
         }

    If the switch value is a class, `isCase` will return true if the switch value is assignable from the given class (case value), i.e. the case class is the same as, or a superclass, or a super-interface of the switch class, for example:

         switch (ArrayList) {
           case List:
             assert true : 'is a list'
             break
           case Map:
             assert false : 'is not a Map'
             break
           default:
             assert false : 'should never get here'
             break
         }

    Parameters:
      `caseValue` - the case value
      `switchValue` - the switch value
    Returns:
      true if the switchValue is deemed to be assignable from the given class
    Since:
      1.0

  - ### isCase

    public static boolean isCase(Collection caseValue, Object switchValue)
    'Case' implementation for collections which tests if the 'switch' operand is contained in any of the 'case' values. For example:

        switch( 3 ) {
           case [1,3,5]:
             assert true
             break
           default:
             assert false
         }

    Parameters:
      `caseValue` - the case value
      `switchValue` - the switch value
    Returns:
      true if the caseValue is deemed to contain the switchValue
    Since:
      1.0
    See Also:
      - `Collection.contains(java.lang.Object)`

  - ### isCase

    public static boolean isCase(Map caseValue, Object switchValue)
    'Case' implementation for maps which tests the groovy truth value obtained using the 'switch' operand as key. For example:

        switch( 'foo' ) {
           case [foo:true, bar:false]:
             assert true
             break
           default:
             assert false
         }

    Parameters:
      `caseValue` - the case value
      `switchValue` - the switch value
    Returns:
      the groovy truth value from caseValue corresponding to the switchValue key
    Since:
      1.7.6

  - ### isCase

    public static boolean isCase(Number caseValue, Number switchValue)
    Special 'case' implementation for all numbers, which delegates to the `compareTo()` method for comparing numbers of different types.
    Parameters:
      `caseValue` - the case value
      `switchValue` - the switch value
    Returns:
      true if the numbers are deemed equal
    Since:
      1.5.0

  - ### isNotCase

    public static boolean isNotCase(Number caseValue, Number switchValue)
    Since:
      4.0.0

  - ### isNotCase

    public static boolean isNotCase(Object caseValue, Object switchValue)
    Since:
      4.0.0

  - ### isNotCase

    public static boolean isNotCase(Class<?> caseValue, Object switchValue)
    Since:
      4.0.0

  - ### isNotCase

    public static boolean isNotCase(Closure<?> caseValue, Object switchValue)
    Since:
      4.0.0

  - ### isNotCase

    public static boolean isNotCase(Collection<?> caseValue, Object switchValue)
    Since:
      4.0.0

  - ### isNotCase

    public static boolean isNotCase(Map<?,?> caseValue, Object switchValue)
    Since:
      4.0.0

  - ### unique

    public static <T> Iterator<T> unique(Iterator<T> self)
    Returns an iterator equivalent to this iterator with all duplicated items removed by using Groovy's default number-aware comparator. The original iterator will become exhausted of elements after determining the unique values. A new iterator for the unique values will be returned.
    Parameters:
      `self` - an Iterator
    Returns:
      a new Iterator of the unique items from the original iterator
    Since:
      1.5.5

  - ### unique

    public static <T> Collection<T> unique(Collection<T> self)
    Modifies this collection to remove all duplicated items, using Groovy's default number-aware comparator.

        assert [1,3] == [1,3,3].unique()

    Parameters:
      `self` - a collection
    Returns:
      the now modified collection
    Since:
      1.0
    See Also:
      - `unique(Collection, boolean)`

  - ### unique

    public static <T> List<T> unique(List<T> self)
    Modifies this List to remove all duplicated items, using Groovy's default number-aware comparator.

        assert [1,3] == [1,3,3].unique()

    Parameters:
      `self` - a List
    Returns:
      the now modified List
    Since:
      2.4.0
    See Also:
      - `unique(Collection, boolean)`

  - ### unique

    public static <T> Collection<T> unique(Collection<T> self, boolean mutate)
    Remove all duplicates from a given Collection using Groovy's default number-aware comparator. If mutate is true, it works by modifying the original object (and also returning it). If mutate is false, a new collection is returned leaving the original unchanged.

         assert [1,3] == [1,3,3].unique()

         def orig = [1, 3, 2, 3]
         def uniq = orig.unique(false)
         assert orig == [1, 3, 2, 3]
         assert uniq == [1, 3, 2]

    Parameters:
      `self` - a collection
      `mutate` - false will cause a new list containing unique items from the collection to be created, true will mutate collections in place
    Returns:
      the now modified collection
    Since:
      1.8.1

  - ### unique

    public static <T> List<T> unique(List<T> self, boolean mutate)
    Remove all duplicates from a given List using Groovy's default number-aware comparator. If mutate is true, it works by modifying the original object (and also returning it). If mutate is false, a new collection is returned leaving the original unchanged.

         assert [1,3] == [1,3,3].unique()

         def orig = [1, 3, 2, 3]
         def uniq = orig.unique(false)
         assert orig == [1, 3, 2, 3]
         assert uniq == [1, 3, 2]

    Parameters:
      `self` - a List
      `mutate` - false will cause a new List containing unique items from the List to be created, true will mutate List in place
    Returns:
      the now modified List
    Since:
      2.4.0

  - ### numberAwareCompareTo

    public static int numberAwareCompareTo(Comparable self, Comparable other)
    Provides a method that compares two comparables using Groovy's default number aware comparator.
    Parameters:
      `self` - a Comparable
      `other` - another Comparable
    Returns:
      a -ve number, 0 or a +ve number according to Groovy's compareTo contract
    Since:
      1.6.0

  - ### unique

    public static <T> Iterator<T> unique(Iterator<T> self, Closure condition)
    Returns an iterator equivalent to this iterator but with all duplicated items removed by using a Closure to determine duplicate (equal) items. The original iterator will be fully processed after the call.

    If the closure takes a single parameter, the argument passed will be each element, and the closure should return a value used for comparison (either using `Comparable.compareTo(java.lang.Object)` or `Object.equals(java.lang.Object)`). If the closure takes two parameters, two items from the Iterator will be passed as arguments, and the closure should return an int value (with 0 indicating the items are not unique).

    Parameters:
      `self` - an Iterator
      `condition` - a Closure used to determine unique items
    Returns:
      the modified Iterator
    Since:
      1.5.5

  - ### unique

    public static <T> Collection<T> unique(Collection<T> self, Closure closure)
    A convenience method for making a collection unique using a Closure to determine duplicate (equal) items.

    If the closure takes a single parameter, the argument passed will be each element, and the closure should return a value used for comparison (either using `Comparable.compareTo(java.lang.Object)` or `Object.equals(java.lang.Object)`). If the closure takes two parameters, two items from the collection will be passed as arguments, and the closure should return an int value (with 0 indicating the items are not unique).

        assert [1,4] == [1,3,4,5].unique { it % 2 }

        assert [2,3,4] == [2,3,3,4].unique { a, b -> a <=> b }

    Parameters:
      `self` - a Collection
      `closure` - a 1 or 2 arg Closure used to determine unique items
    Returns:
      self without any duplicates
    Since:
      1.0
    See Also:
      - `unique(Collection, boolean, Closure)`

  - ### unique

    public static <T> List<T> unique(List<T> self, Closure closure)
    A convenience method for making a List unique using a Closure to determine duplicate (equal) items.

    If the closure takes a single parameter, the argument passed will be each element, and the closure should return a value used for comparison (either using `Comparable.compareTo(java.lang.Object)` or `Object.equals(java.lang.Object)`). If the closure takes two parameters, two items from the List will be passed as arguments, and the closure should return an int value (with 0 indicating the items are not unique).

        assert [1,4] == [1,3,4,5].unique { it % 2 }

        assert [2,3,4] == [2,3,3,4].unique { a, b -> a <=> b }

    Parameters:
      `self` - a List
      `closure` - a 1 or 2 arg Closure used to determine unique items
    Returns:
      self without any duplicates
    Since:
      2.4.0
    See Also:
      - `unique(Collection, boolean, Closure)`

  - ### unique

    public static <T> Collection<T> unique(Collection<T> self, boolean mutate, Closure closure)
    A convenience method for making a collection unique using a Closure to determine duplicate (equal) items. If mutate is true, it works on the receiver object and returns it. If mutate is false, a new collection is returned.

    If the closure takes a single parameter, each element from the Collection will be passed to the closure. The closure should return a value used for comparison (either using `Comparable.compareTo(java.lang.Object)` or `Object.equals(java.lang.Object)`). If the closure takes two parameters, two items from the collection will be passed as arguments, and the closure should return an int value (with 0 indicating the items are not unique).

         def orig = [1, 3, 4, 5]
         def uniq = orig.unique(false) { it % 2 }
         assert orig == [1, 3, 4, 5]
         assert uniq == [1, 4]

         def orig = [2, 3, 3, 4]
         def uniq = orig.unique(false) { a, b -> a <=> b }
         assert orig == [2, 3, 3, 4]
         assert uniq == [2, 3, 4]

    Parameters:
      `self` - a Collection
      `mutate` - false will always cause a new list to be created, true will mutate lists in place
      `closure` - a 1 or 2 arg Closure used to determine unique items
    Returns:
      self without any duplicates
    Since:
      1.8.1

  - ### unique

    public static <T> List<T> unique(List<T> self, boolean mutate, Closure closure)
    A convenience method for making a List unique using a Closure to determine duplicate (equal) items. If mutate is true, it works on the receiver object and returns it. If mutate is false, a new collection is returned.

    If the closure takes a single parameter, each element from the List will be passed to the closure. The closure should return a value used for comparison (either using `Comparable.compareTo(java.lang.Object)` or `Object.equals(java.lang.Object)`). If the closure takes two parameters, two items from the collection will be passed as arguments, and the closure should return an int value (with 0 indicating the items are not unique).

         def orig = [1, 3, 4, 5]
         def uniq = orig.unique(false) { it % 2 }
         assert orig == [1, 3, 4, 5]
         assert uniq == [1, 4]

         def orig = [2, 3, 3, 4]
         def uniq = orig.unique(false) { a, b -> a <=> b }
         assert orig == [2, 3, 3, 4]
         assert uniq == [2, 3, 4]

    Parameters:
      `self` - a List
      `mutate` - false will always cause a new list to be created, true will mutate lists in place
      `closure` - a 1 or 2 arg Closure used to determine unique items
    Returns:
      self without any duplicates
    Since:
      2.4.0

  - ### unique

    public static <T> Iterator<T> unique(Iterator<T> self, Comparator<? super T> comparator)
    Returns an iterator equivalent to this iterator with all duplicated items removed by using the supplied comparator. The original iterator will be exhausted upon returning.
    Parameters:
      `self` - an Iterator
      `comparator` - a Comparator
    Returns:
      the modified Iterator
    Since:
      1.5.5

  - ### unique

    public static <T> Collection<T> unique(Collection<T> self, Comparator<? super T> comparator)
    Remove all duplicates from a given Collection. Works on the original object (and also returns it). The order of members in the Collection are compared by the given Comparator. For each duplicate, the first member which is returned by the given Collection's iterator is retained, but all other ones are removed. The given Collection's original order is preserved.

         class Person {
             def fname, lname
             String toString() {
                 return fname + " " + lname
             }
         }

         class PersonComparator implements Comparator {
             int compare(Object o1, Object o2) {
                 Person p1 = (Person) o1
                 Person p2 = (Person) o2
                 if (p1.lname != p2.lname)
                     return p1.lname.compareTo(p2.lname)
                 else
                     return p1.fname.compareTo(p2.fname)
             }

             boolean equals(Object obj) {
                 return this.equals(obj)
             }
         }

         Person a = new Person(fname:"John", lname:"Taylor")
         Person b = new Person(fname:"Clark", lname:"Taylor")
         Person c = new Person(fname:"Tom", lname:"Cruz")
         Person d = new Person(fname:"Clark", lname:"Taylor")

         def list = [a, b, c, d]
         List list2 = list.unique(new PersonComparator())
         assert( list2 == list && list == [a, b, c] )

    Parameters:
      `self` - a Collection
      `comparator` - a Comparator
    Returns:
      self the now modified collection without duplicates
    Since:
      1.0
    See Also:
      - `unique(java.util.Collection, boolean, java.util.Comparator)`

  - ### unique

    public static <T> List<T> unique(List<T> self, Comparator<? super T> comparator)
    Remove all duplicates from a given List. Works on the original object (and also returns it). The order of members in the List are compared by the given Comparator. For each duplicate, the first member which is returned by the given List's iterator is retained, but all other ones are removed. The given List's original order is preserved.

         class Person {
             def fname, lname
             String toString() {
                 return fname + " " + lname
             }
         }

         class PersonComparator implements Comparator {
             int compare(Object o1, Object o2) {
                 Person p1 = (Person) o1
                 Person p2 = (Person) o2
                 if (p1.lname != p2.lname)
                     return p1.lname.compareTo(p2.lname)
                 else
                     return p1.fname.compareTo(p2.fname)
             }

             boolean equals(Object obj) {
                 return this.equals(obj)
             }
         }

         Person a = new Person(fname:"John", lname:"Taylor")
         Person b = new Person(fname:"Clark", lname:"Taylor")
         Person c = new Person(fname:"Tom", lname:"Cruz")
         Person d = new Person(fname:"Clark", lname:"Taylor")

         def list = [a, b, c, d]
         List list2 = list.unique(new PersonComparator())
         assert( list2 == list && list == [a, b, c] )

    Parameters:
      `self` - a List
      `comparator` - a Comparator
    Returns:
      self the now modified List without duplicates
    Since:
      2.4.0
    See Also:
      - `unique(java.util.Collection, boolean, java.util.Comparator)`

  - ### unique

    public static <T> Collection<T> unique(Collection<T> self, boolean mutate, Comparator<? super T> comparator)
    Remove all duplicates from a given Collection. If mutate is true, it works on the original object (and also returns it). If mutate is false, a new collection is returned. The order of members in the Collection are compared by the given Comparator. For each duplicate, the first member which is returned by the given Collection's iterator is retained, but all other ones are removed. The given Collection's original order is preserved.

         class Person {
             def fname, lname
             String toString() {
                 return fname + " " + lname
             }
         }

         class PersonComparator implements Comparator {
             int compare(Object o1, Object o2) {
                 Person p1 = (Person) o1
                 Person p2 = (Person) o2
                 if (p1.lname != p2.lname)
                     return p1.lname.compareTo(p2.lname)
                 else
                     return p1.fname.compareTo(p2.fname)
             }

             boolean equals(Object obj) {
                 return this.equals(obj)
             }
         }

         Person a = new Person(fname:"John", lname:"Taylor")
         Person b = new Person(fname:"Clark", lname:"Taylor")
         Person c = new Person(fname:"Tom", lname:"Cruz")
         Person d = new Person(fname:"Clark", lname:"Taylor")

         def list = [a, b, c, d]
         List list2 = list.unique(false, new PersonComparator())
         assert( list2 != list && list2 == [a, b, c] )

    Parameters:
      `self` - a Collection
      `mutate` - false will always cause a new collection to be created, true will mutate collections in place
      `comparator` - a Comparator
    Returns:
      self the collection without duplicates
    Since:
      1.8.1

  - ### unique

    public static <T> List<T> unique(List<T> self, boolean mutate, Comparator<? super T> comparator)
    Remove all duplicates from a given List. If mutate is true, it works on the original object (and also returns it). If mutate is false, a new List is returned. The order of members in the List are compared by the given Comparator. For each duplicate, the first member which is returned by the given List's iterator is retained, but all other ones are removed. The given List's original order is preserved.

         class Person {
             def fname, lname
             String toString() {
                 return fname + " " + lname
             }
         }

         class PersonComparator implements Comparator {
             int compare(Object o1, Object o2) {
                 Person p1 = (Person) o1
                 Person p2 = (Person) o2
                 if (p1.lname != p2.lname)
                     return p1.lname.compareTo(p2.lname)
                 else
                     return p1.fname.compareTo(p2.fname)
             }

             boolean equals(Object obj) {
                 return this.equals(obj)
             }
         }

         Person a = new Person(fname:"John", lname:"Taylor")
         Person b = new Person(fname:"Clark", lname:"Taylor")
         Person c = new Person(fname:"Tom", lname:"Cruz")
         Person d = new Person(fname:"Clark", lname:"Taylor")

         def list = [a, b, c, d]
         List list2 = list.unique(false, new PersonComparator())
         assert( list2 != list && list2 == [a, b, c] )

    Parameters:
      `self` - a List
      `mutate` - false will always cause a new List to be created, true will mutate List in place
      `comparator` - a Comparator
    Returns:
      self the List without duplicates
    Since:
      2.4.0

  - ### toUnique

    public static <T> Iterator<T> toUnique(Iterator<T> self, Closure condition)
    Returns an iterator equivalent to this iterator but with all duplicated items removed where duplicate (equal) items are deduced by calling the supplied Closure condition.

    If the supplied Closure takes a single parameter, the argument passed will be each element, and the closure should return a value used for comparison (either using `Comparable.compareTo(java.lang.Object)` or `Object.equals(java.lang.Object)`). If the closure takes two parameters, two items from the Iterator will be passed as arguments, and the closure should return an int value (with 0 indicating the items are not unique).

         def items = "Hello".toList() + [null, null] + "there".toList()
         def toLower = { it == null ? null : it.toLowerCase() }
         def noDups = items.iterator().toUnique(toLower).toList()
         assert noDups == ['H', 'e', 'l', 'o', null, 't', 'r']

        assert [1,4] == [1,3,4,5].toUnique { it % 2 }

        assert [2,3,4] == [2,3,3,4].toUnique { a, b -> a <=> b }

    Parameters:
      `self` - an Iterator
      `condition` - a Closure used to determine unique items
    Returns:
      an Iterator with no duplicate items
    Since:
      2.4.0

  - ### toUnique

    public static <T> Iterator<T> toUnique(Iterator<T> self, Comparator<? super T> comparator)
    Returns an iterator equivalent to this iterator with all duplicated items removed by using the supplied comparator.
    Parameters:
      `self` - an Iterator
      `comparator` - a Comparator used to determine unique (equal) items If `null`, the Comparable natural ordering of the elements will be used.
    Returns:
      an Iterator with no duplicate items
    Since:
      2.4.0

  - ### toUnique

    public static <T> Iterator<T> toUnique(Iterator<T> self)
    Returns an iterator equivalent to this iterator with all duplicated items removed by using the natural ordering of the items.
    Parameters:
      `self` - an Iterator
    Returns:
      an Iterator with no duplicate items
    Since:
      2.4.0

  - ### toUnique

    public static <T> Collection<T> toUnique(Iterable<T> self, Comparator<? super T> comparator)
    Returns a Collection containing the items from the Iterable but with duplicates removed. The items in the Iterable are compared by the given Comparator. For each duplicate, the first member which is returned from the Iterable is retained, but all other ones are removed.

         class Person {
             def fname, lname
             String toString() {
                 return fname + " " + lname
             }
         }

         class PersonComparator implements Comparator {
             int compare(Object o1, Object o2) {
                 Person p1 = (Person) o1
                 Person p2 = (Person) o2
                 if (p1.lname != p2.lname)
                     return p1.lname.compareTo(p2.lname)
                 else
                     return p1.fname.compareTo(p2.fname)
             }

             boolean equals(Object obj) {
                 return this.equals(obj)
             }
         }

         Person a = new Person(fname:"John", lname:"Taylor")
         Person b = new Person(fname:"Clark", lname:"Taylor")
         Person c = new Person(fname:"Tom", lname:"Cruz")
         Person d = new Person(fname:"Clark", lname:"Taylor")

         def list = [a, b, c, d]
         List list2 = list.toUnique(new PersonComparator())
         assert list2 == [a, b, c] && list == [a, b, c, d]

    Parameters:
      `self` - an Iterable
      `comparator` - a Comparator used to determine unique (equal) items If `null`, the Comparable natural ordering of the elements will be used.
    Returns:
      the Collection of non-duplicate items
    Since:
      2.4.0

  - ### toUnique

    public static <T> List<T> toUnique(List<T> self, Comparator<? super T> comparator)
    Returns a List containing the items from the List but with duplicates removed. The items in the List are compared by the given Comparator. For each duplicate, the first member which is returned from the List is retained, but all other ones are removed.

         class Person {
             def fname, lname
             String toString() {
                 return fname + " " + lname
             }
         }

         class PersonComparator implements Comparator {
             int compare(Object o1, Object o2) {
                 Person p1 = (Person) o1
                 Person p2 = (Person) o2
                 if (p1.lname != p2.lname)
                     return p1.lname.compareTo(p2.lname)
                 else
                     return p1.fname.compareTo(p2.fname)
             }

             boolean equals(Object obj) {
                 return this.equals(obj)
             }
         }

         Person a = new Person(fname:"John", lname:"Taylor")
         Person b = new Person(fname:"Clark", lname:"Taylor")
         Person c = new Person(fname:"Tom", lname:"Cruz")
         Person d = new Person(fname:"Clark", lname:"Taylor")

         def list = [a, b, c, d]
         List list2 = list.toUnique(new PersonComparator())
         assert list2 == [a, b, c] && list == [a, b, c, d]

    Parameters:
      `self` - a List
      `comparator` - a Comparator used to determine unique (equal) items If `null`, the Comparable natural ordering of the elements will be used.
    Returns:
      the List of non-duplicate items
    Since:
      2.4.0

  - ### toUnique

    public static <T> Collection<T> toUnique(Iterable<T> self)
    Returns a Collection containing the items from the Iterable but with duplicates removed using the natural ordering of the items to determine uniqueness.

         String[] letters = ['c', 'a', 't', 's', 'a', 't', 'h', 'a', 't']
         String[] expected = ['c', 'a', 't', 's', 'h']
         assert letters.toUnique() == expected

    Parameters:
      `self` - an Iterable
    Returns:
      the Collection of non-duplicate items
    Since:
      2.4.0

  - ### toUnique

    public static <T> List<T> toUnique(List<T> self)
    Returns a List containing the items from the List but with duplicates removed using the natural ordering of the items to determine uniqueness.

         def letters = ['c', 'a', 't', 's', 'a', 't', 'h', 'a', 't']
         def expected = ['c', 'a', 't', 's', 'h']
         assert letters.toUnique() == expected

    Parameters:
      `self` - a List
    Returns:
      the List of non-duplicate items
    Since:
      2.4.0

  - ### toUnique

    public static <T> Collection<T> toUnique(Iterable<T> self, Closure condition)
    Returns a Collection containing the items from the Iterable but with duplicates removed. The items in the Iterable are compared by the given Closure condition. For each duplicate, the first member which is returned from the Iterable is retained, but all other ones are removed.

    If the closure takes a single parameter, each element from the Iterable will be passed to the closure. The closure should return a value used for comparison (either using `Comparable.compareTo(java.lang.Object)` or `Object.equals(java.lang.Object)`). If the closure takes two parameters, two items from the Iterable will be passed as arguments, and the closure should return an int value (with 0 indicating the items are not unique).

         class Person {
             def fname, lname
             String toString() {
                 return fname + " " + lname
             }
         }

         Person a = new Person(fname:"John", lname:"Taylor")
         Person b = new Person(fname:"Clark", lname:"Taylor")
         Person c = new Person(fname:"Tom", lname:"Cruz")
         Person d = new Person(fname:"Clark", lname:"Taylor")

         def list = [a, b, c, d]
         def list2 = list.toUnique{ p1, p2 -> p1.lname != p2.lname ? p1.lname <=> p2.lname : p1.fname <=> p2.fname }
         assert( list2 == [a, b, c] && list == [a, b, c, d] )
         def list3 = list.toUnique{ it.toString() }
         assert( list3 == [a, b, c] && list == [a, b, c, d] )

    Parameters:
      `self` - an Iterable
      `condition` - a Closure used to determine unique items
    Returns:
      a new Collection
    Since:
      2.4.0
    See Also:
      - `toUnique(Iterable, Comparator)`

  - ### toUnique

    public static <T> List<T> toUnique(List<T> self, Closure condition)
    Returns a List containing the items from the List but with duplicates removed. The items in the List are compared by the given Closure condition. For each duplicate, the first member which is returned from the Iterable is retained, but all other ones are removed.

    If the closure takes a single parameter, each element from the Iterable will be passed to the closure. The closure should return a value used for comparison (either using `Comparable.compareTo(java.lang.Object)` or `Object.equals(java.lang.Object)`). If the closure takes two parameters, two items from the Iterable will be passed as arguments, and the closure should return an int value (with 0 indicating the items are not unique).

         class Person {
             def fname, lname
             String toString() {
                 return fname + " " + lname
             }
         }

         Person a = new Person(fname:"John", lname:"Taylor")
         Person b = new Person(fname:"Clark", lname:"Taylor")
         Person c = new Person(fname:"Tom", lname:"Cruz")
         Person d = new Person(fname:"Clark", lname:"Taylor")

         def list = [a, b, c, d]
         def list2 = list.toUnique{ p1, p2 -> p1.lname != p2.lname ? p1.lname <=> p2.lname : p1.fname <=> p2.fname }
         assert( list2 == [a, b, c] && list == [a, b, c, d] )
         def list3 = list.toUnique{ it.toString() }
         assert( list3 == [a, b, c] && list == [a, b, c, d] )

    Parameters:
      `self` - a List
      `condition` - a Closure used to determine unique items
    Returns:
      a new List
    Since:
      2.4.0
    See Also:
      - `toUnique(Iterable, Comparator)`

  - ### toUnique

    public static <T> T[] toUnique(T[] self, Comparator<? super T> comparator)
    Returns a new Array containing the items from the original Array but with duplicates removed with the supplied comparator determining which items are unique.

         String[] letters = ['c', 'a', 't', 's', 'A', 't', 'h', 'a', 'T']
         String[] lower = ['c', 'a', 't', 's', 'h']
         class LowerComparator implements Comparator {
             int compare(let1, let2) { let1.toLowerCase() <=> let2.toLowerCase() }
         }
         assert letters.toUnique(new LowerComparator()) == lower

    Parameters:
      `self` - an array
      `comparator` - a Comparator used to determine unique (equal) items If `null`, the Comparable natural ordering of the elements will be used.
    Returns:
      the unique items from the array

  - ### toUnique

    public static <T> T[] toUnique(T[] self)
    Returns a new Array containing the items from the original Array but with duplicates removed using the natural ordering of the items in the array.

         String[] letters = ['c', 'a', 't', 's', 'a', 't', 'h', 'a', 't']
         String[] expected = ['c', 'a', 't', 's', 'h']
         def result = letters.toUnique()
         assert result == expected
         assert result.class.componentType == String

    Parameters:
      `self` - an array
    Returns:
      the unique items from the array

  - ### toUnique

    public static <T> T[] toUnique(T[] self, Closure condition)
    Returns a new Array containing the items from the original Array but with duplicates removed with the supplied comparator determining which items are unique.

         String[] letters = ['c', 'a', 't', 's', 'A', 't', 'h', 'a', 'T']
         String[] expected = ['c', 'a', 't', 's', 'h']
         assert letters.toUnique{ p1, p2 -> p1.toLowerCase() <=> p2.toLowerCase() } == expected
         assert letters.toUnique{ it.toLowerCase() } == expected

    Parameters:
      `self` - an array
      `condition` - a Closure used to determine unique items
    Returns:
      the unique items from the array

  - ### each

    public static <T> T[] each(T[] self, Closure closure)
    Iterates through an array passing each array entry to the given closure.

         String[] letters = ['a', 'b', 'c']
         String result = ''
         letters.each{ result += it }
         assert result == 'abc'

    Parameters:
      `self` - the array over which we iterate
      `closure` - the closure applied on each array entry
    Returns:
      the self array
    Since:
      2.5.0

  - ### each

    public static <T> T each(T self, Closure closure)
    Iterates through an aggregate type or data structure, passing each item to the given closure. Custom types may utilize this method by simply providing an "iterator()" method. The items returned from the resulting iterator will be passed to the closure.

         String result = ''
         ['a', 'b', 'c'].each{ result += it }
         assert result == 'abc'

    Parameters:
      `self` - the object over which we iterate
      `closure` - the closure applied on each element found
    Returns:
      the self Object
    Since:
      1.0

  - ### eachWithIndex

    public static <T> T[] eachWithIndex(T[] self, Closure closure)
    Iterates through an array, passing each array element and the element's index (a counter starting at zero) to the given closure.

         String[] letters = ['a', 'b', 'c']
         String result = ''
         letters.eachWithIndex{ letter, index -> result += "$index:$letter" }
         assert result == '0:a1:b2:c'

    Parameters:
      `self` - an array
      `closure` - a Closure to operate on each array entry
    Returns:
      the self array
    Since:
      2.5.0

  - ### eachWithIndex

    public static <T> T eachWithIndex(T self, Closure closure)
    Iterates through an aggregate type or data structure, passing each item and the item's index (a counter starting at zero) to the given closure.

         String result = ''
         ['a', 'b', 'c'].eachWithIndex{ letter, index -> result += "$index:$letter" }
         assert result == '0:a1:b2:c'

    Parameters:
      `self` - an Object
      `closure` - a Closure to operate on each item
    Returns:
      the self Object
    Since:
      1.0

  - ### eachWithIndex

    public static <T> Iterable<T> eachWithIndex(Iterable<T> self, Closure closure)
    Iterates through an iterable type, passing each item and the item's index (a counter starting at zero) to the given closure.
    Parameters:
      `self` - an Iterable
      `closure` - a Closure to operate on each item
    Returns:
      the self Iterable
    Since:
      2.3.0

  - ### eachWithIndex

    public static <T> Iterator<T> eachWithIndex(Iterator<T> self, Closure closure)
    Iterates through an iterator type, passing each item and the item's index (a counter starting at zero) to the given closure.
    Parameters:
      `self` - an Iterator
      `closure` - a Closure to operate on each item
    Returns:
      the self Iterator (now exhausted)
    Since:
      2.3.0

  - ### eachWithIndex

    public static <T> Collection<T> eachWithIndex(Collection<T> self, Closure closure)
    Iterates through a Collection, passing each item and the item's index (a counter starting at zero) to the given closure.
    Parameters:
      `self` - a Collection
      `closure` - a Closure to operate on each item
    Returns:
      the self Collection
    Since:
      2.4.0

  - ### eachWithIndex

    public static <T> List<T> eachWithIndex(List<T> self, Closure closure)
    Iterates through a List, passing each item and the item's index (a counter starting at zero) to the given closure.
    Parameters:
      `self` - a List
      `closure` - a Closure to operate on each item
    Returns:
      the self List
    Since:
      2.4.0

  - ### eachWithIndex

    public static <T> Set<T> eachWithIndex(Set<T> self, Closure closure)
    Iterates through a Set, passing each item and the item's index (a counter starting at zero) to the given closure.
    Parameters:
      `self` - a Set
      `closure` - a Closure to operate on each item
    Returns:
      the self Set
    Since:
      2.4.0

  - ### eachWithIndex

    public static <T> SortedSet<T> eachWithIndex(SortedSet<T> self, Closure closure)
    Iterates through a SortedSet, passing each item and the item's index (a counter starting at zero) to the given closure.
    Parameters:
      `self` - a SortedSet
      `closure` - a Closure to operate on each item
    Returns:
      the self SortedSet
    Since:
      2.4.0

  - ### each

    public static <T> Iterable<T> each(Iterable<T> self, Closure closure)
    Iterates through an Iterable, passing each item to the given closure.
    Parameters:
      `self` - the Iterable over which we iterate
      `closure` - the closure applied on each element found
    Returns:
      the self Iterable

  - ### each

    public static <T> Iterator<T> each(Iterator<T> self, Closure closure)
    Iterates through an Iterator, passing each item to the given closure.
    Parameters:
      `self` - the Iterator over which we iterate
      `closure` - the closure applied on each element found
    Returns:
      the self Iterator
    Since:
      2.4.0

  - ### each

    public static <T> Collection<T> each(Collection<T> self, Closure closure)
    Iterates through a Collection, passing each item to the given closure.
    Parameters:
      `self` - the Collection over which we iterate
      `closure` - the closure applied on each element found
    Returns:
      the self Collection
    Since:
      2.4.0

  - ### each

    public static <T> List<T> each(List<T> self, Closure closure)
    Iterates through a List, passing each item to the given closure.
    Parameters:
      `self` - the List over which we iterate
      `closure` - the closure applied on each element found
    Returns:
      the self List
    Since:
      2.4.0

  - ### each

    public static <T> Set<T> each(Set<T> self, Closure closure)
    Iterates through a Set, passing each item to the given closure.
    Parameters:
      `self` - the Set over which we iterate
      `closure` - the closure applied on each element found
    Returns:
      the self Set
    Since:
      2.4.0

  - ### each

    public static <T> SortedSet<T> each(SortedSet<T> self, Closure closure)
    Iterates through a SortedSet, passing each item to the given closure.
    Parameters:
      `self` - the SortedSet over which we iterate
      `closure` - the closure applied on each element found
    Returns:
      the self SortedSet
    Since:
      2.4.0

  - ### each

    public static <K, V> Map<K,V> each(Map<K,V> self, Closure<?> closure)
    Allows a Map to be iterated through using a closure. If the closure takes one parameter then it will be passed the Map.Entry otherwise if the closure takes two parameters then it will be passed the key and the value.

        def result = ""
         [a:1, b:3].each { key, value -> result += "$key$value" }
         assert result == "a1b3"

        def result = ""
         [a:1, b:3].each { entry -> result += entry }
         assert result == "a=1b=3"

    In general, the order in which the map contents are processed cannot be guaranteed. In practise, specialized forms of Map, e.g. a TreeMap will have its contents processed according to the natural ordering of the map.
    Parameters:
      `self` - the map over which we iterate
      `closure` - the 1 or 2 arg closure applied on each entry of the map
    Returns:
      returns the self parameter
    Since:
      1.5.0

  - ### reverseEach

    public static <K, V> Map<K,V> reverseEach(Map<K,V> self, Closure<?> closure)
    Allows a Map to be iterated through in reverse order using a closure. In general, the order in which the map contents are processed cannot be guaranteed. In practise, specialized forms of Map, e.g. a TreeMap will have its contents processed according to the reverse of the natural ordering of the map.
    Parameters:
      `self` - the map over which we iterate
      `closure` - the 1 or 2 arg closure applied on each entry of the map
    Returns:
      returns the self parameter
    Since:
      1.7.2
    See Also:
      - `each(Map, Closure)`

  - ### eachWithIndex

    public static <K, V> Map<K,V> eachWithIndex(Map<K,V> self, Closure<?> closure)
    Allows a Map to be iterated through using a closure. If the closure takes two parameters then it will be passed the Map.Entry and the item's index (a counter starting at zero) otherwise if the closure takes three parameters then it will be passed the key, the value, and the index.

        def result = ""
         [a:1, b:3].eachWithIndex { key, value, index -> result += "$index($key$value)" }
         assert result == "0(a1)1(b3)"

        def result = ""
         [a:1, b:3].eachWithIndex { entry, index -> result += "$index($entry)" }
         assert result == "0(a=1)1(b=3)"

    Parameters:
      `self` - the map over which we iterate
      `closure` - a 2 or 3 arg Closure to operate on each item
    Returns:
      the self Object
    Since:
      1.5.0

  - ### reverseEach

    public static <T> List<T> reverseEach(List<T> self, Closure closure)
    Iterate over each element of the list in the reverse order.

        def result = []
         [1,2,3].reverseEach { result << it }
         assert result == [3,2,1]

    Parameters:
      `self` - a List
      `closure` - a closure to which each item is passed.
    Returns:
      the original list
    Since:
      1.5.0

  - ### reverseEach

    public static <T> T[] reverseEach(T[] self, Closure closure)
    Iterate over each element of the array in the reverse order.
    Parameters:
      `self` - an array
      `closure` - a closure to which each item is passed
    Returns:
      the original array
    Since:
      1.5.2

  - ### reverseEach

    public static <T> NavigableSet<T> reverseEach(NavigableSet<T> self, Closure closure)
    Iterate over each element of the set in reverse order.

         TreeSet navSet = [2, 4, 1, 3]  // natural order is sorted
         List result = []
         navSet.reverseEach { result << it }
         assert result == [4, 3, 2, 1]

    Parameters:
      `self` - a NavigableSet
      `closure` - a closure to which each item is passed.
    Returns:
      the original NavigableSet
    Since:
      4.0.11

  - ### every

    public static boolean every(Object self, Closure predicate)
    Used to determine if the given predicate closure is valid (i.e. returns `true` for all items in this data structure). A simple example for a list:

        def list = [3,4,5]
         def greaterThanTwo = list.every { it > 2 }

    Parameters:
      `self` - the object over which we iterate
      `predicate` - the closure predicate used for matching
    Returns:
      true if every iteration of the object matches the closure predicate
    Since:
      1.0

  - ### every

    public static <T> boolean every(Iterator<T> self, Closure predicate)
    Used to determine if the given predicate closure is valid (i.e. returns `true` for all items in this iterator). A simple example for a list:

        def list = [3,4,5]
         def greaterThanTwo = list.iterator().every { it > 2 }

    Parameters:
      `self` - the iterator over which we iterate
      `predicate` - the closure predicate used for matching
    Returns:
      true if every iteration of the object matches the closure predicate
    Since:
      2.3.0

  - ### every

    public static <T> boolean every(T[] self, Closure predicate)
    Used to determine if the given predicate closure is valid (i.e. returns `true` for all items in this Array).
    Parameters:
      `self` - an Array
      `predicate` - the closure predicate used for matching
    Returns:
      true if every element of the Array matches the closure predicate
    Since:
      2.5.0

  - ### every

    public static <T> boolean every(Iterable<T> self, Closure predicate)
    Used to determine if the given predicate closure is valid (i.e. returns `true` for all items in this iterable). A simple example for a list:

        def list = [3,4,5]
         def greaterThanTwo = list.every { it > 2 }

    Parameters:
      `self` - the iterable over which we iterate
      `predicate` - the closure predicate used for matching
    Returns:
      true if every iteration of the object matches the closure predicate
    Since:
      2.3.0

  - ### every

    public static <K, V> boolean every(Map<K,V> self, Closure predicate)
    Iterates over the entries of a map, and checks whether a predicate is valid for all entries. If the closure takes one parameter then it will be passed the Map.Entry otherwise if the closure takes two parameters then it will be passed the key and the value.

        def map = [a:1, b:2.0, c:2L]
         assert !map.every { key, value -> value instanceof Integer }
         assert map.every { entry -> entry.value instanceof Number }

    Parameters:
      `self` - the map over which we iterate
      `predicate` - the 1 or 2 arg Closure predicate used for matching
    Returns:
      true if every entry of the map matches the closure predicate
    Since:
      1.5.0

  - ### every

    public static boolean every(Object self)
    Iterates over every element of a collection, and checks whether all elements are `true` according to the Groovy Truth. Equivalent to `self.every({element `->` element})`

         assert [true, true].every()
         assert [1, 1].every()
         assert ![1, 0].every()

    Parameters:
      `self` - the object over which we iterate
    Returns:
      true if every item in the collection matches satisfies Groovy truth
    Since:
      1.5.0

  - ### any

    public static boolean any(Object self, Closure predicate)
    Iterates over the contents of an object or collection, and checks whether a predicate is valid for at least one element.

         assert [1, 2, 3].any { it == 2 }
         assert ![1, 2, 3].any { it > 3 }

    Parameters:
      `self` - the object over which we iterate
      `predicate` - the closure predicate used for matching
    Returns:
      true if any iteration for the object matches the closure predicate
    Since:
      1.0

  - ### any

    public static <T> boolean any(Iterator<T> self, Closure predicate)
    Iterates over the contents of an iterator, and checks whether a predicate is valid for at least one element.

         assert [1, 2, 3].iterator().any { it == 2 }
         assert ![1, 2, 3].iterator().any { it > 3 }

    Parameters:
      `self` - the iterator over which we iterate
      `predicate` - the closure predicate used for matching
    Returns:
      true if any iteration for the object matches the closure predicate
    Since:
      1.0

  - ### any

    public static <T> boolean any(Iterable<T> self, Closure predicate)
    Iterates over the contents of an iterable, and checks whether a predicate is valid for at least one element.

         assert [1, 2, 3].any { it == 2 }
         assert ![1, 2, 3].any { it > 3 }

    Parameters:
      `self` - the iterable over which we iterate
      `predicate` - the closure predicate used for matching
    Returns:
      true if any iteration for the object matches the closure predicate
    Since:
      1.0

  - ### any

    public static <T> boolean any(T[] self, Closure predicate)
    Iterates over the contents of an Array, and checks whether a predicate is valid for at least one element.
    Parameters:
      `self` - the array over which we iterate
      `predicate` - the closure predicate used for matching
    Returns:
      true if any iteration for the object matches the closure predicate
    Since:
      2.5.0

  - ### any

    public static <K, V> boolean any(Map<K,V> self, Closure<?> predicate)
    Iterates over the entries of a map, and checks whether a predicate is valid for at least one entry. If the closure takes one parameter then it will be passed the Map.Entry otherwise if the closure takes two parameters then it will be passed the key and the value.

         assert [2:3, 4:5, 5:10].any { key, value -> key * 2 == value }
         assert ![2:3, 4:5, 5:10].any { entry -> entry.key == entry.value * 2 }

    Parameters:
      `self` - the map over which we iterate
      `predicate` - the 1 or 2 arg closure predicate used for matching
    Returns:
      true if any entry in the map matches the closure predicate
    Since:
      1.5.0

  - ### any

    public static boolean any(Object self)
    Iterates over the elements of a collection, and checks whether at least one element is true according to the Groovy Truth. Equivalent to self.any({element `->` element})

         assert [false, true].any()
         assert [0, 1].any()
         assert ![0, 0].any()

    Parameters:
      `self` - the object over which we iterate
    Returns:
      true if any item in the collection matches the closure predicate
    Since:
      1.5.0

  - ### grep

    public static Collection grep(Object self, Object filter)
    Iterates over the collection of items which this Object represents and returns each item that matches the given filter - calling the ``isCase(java.lang.Object, java.lang.Object)`` method used by switch statements. This method can be used with different kinds of filters like regular expressions, classes, ranges etc. Example:

         def list = ['a', 'b', 'aa', 'bc', 3, 4.5]
         assert list.grep( ~/a+/ )  == ['a', 'aa']
         assert list.grep( ~/../ )  == ['aa', 'bc']
         assert list.grep( Number ) == [ 3, 4.5 ]
         assert list.grep{ it.toString().size() == 1 } == [ 'a', 'b', 3 ]

    Parameters:
      `self` - the object over which we iterate
      `filter` - the filter to perform on the object (using the `isCase(java.lang.Object, java.lang.Object)` method)
    Returns:
      a collection of objects which match the filter
    Since:
      1.5.6

  - ### grep

    public static <T> Collection<T> grep(Collection<T> self, Object filter)
    Iterates over the collection of items and returns each item that matches the given filter - calling the ``isCase(java.lang.Object, java.lang.Object)`` method used by switch statements. method can be used with different kinds of filters like regular expressions, classes, ranges etc. Example:

         def list = ['a', 'b', 'aa', 'bc', 3, 4.5]
         assert list.grep( ~/a+/ )  == ['a', 'aa']
         assert list.grep( ~/../ )  == ['aa', 'bc']
         assert list.grep( Number ) == [ 3, 4.5 ]
         assert list.grep{ it.toString().size() == 1 } == [ 'a', 'b', 3 ]

    Parameters:
      `self` - a collection
      `filter` - the filter to perform on each element of the collection (using the `isCase(java.lang.Object, java.lang.Object)` method)
    Returns:
      a collection of objects which match the filter
    Since:
      2.0

  - ### grep

    public static <T> List<T> grep(List<T> self, Object filter)
    Iterates over the collection of items and returns each item that matches the given filter - calling the ``isCase(java.lang.Object, java.lang.Object)`` method used by switch statements. This method can be used with different kinds of filters like regular expressions, classes, ranges etc. Example:

         def list = ['a', 'b', 'aa', 'bc', 3, 4.5]
         assert list.grep( ~/a+/ )  == ['a', 'aa']
         assert list.grep( ~/../ )  == ['aa', 'bc']
         assert list.grep( Number ) == [ 3, 4.5 ]
         assert list.grep{ it.toString().size() == 1 } == [ 'a', 'b', 3 ]

    Parameters:
      `self` - a List
      `filter` - the filter to perform on each element of the collection (using the `isCase(java.lang.Object, java.lang.Object)` method)
    Returns:
      a List of objects which match the filter
    Since:
      2.4.0

  - ### grep

    public static <T> Set<T> grep(Set<T> self, Object filter)
    Iterates over the collection of items and returns each item that matches the given filter - calling the ``isCase(java.lang.Object, java.lang.Object)`` method used by switch statements. This method can be used with different kinds of filters like regular expressions, classes, ranges etc. Example:

         def set = ['a', 'b', 'aa', 'bc', 3, 4.5] as Set
         assert set.grep( ~/a+/ )  == ['a', 'aa'] as Set
         assert set.grep( ~/../ )  == ['aa', 'bc'] as Set
         assert set.grep( Number ) == [ 3, 4.5 ] as Set
         assert set.grep{ it.toString().size() == 1 } == [ 'a', 'b', 3 ] as Set

    Parameters:
      `self` - a Set
      `filter` - the filter to perform on each element of the collection (using the `isCase(java.lang.Object, java.lang.Object)` method)
    Returns:
      a Set of objects which match the filter
    Since:
      2.4.0

  - ### grep

    public static <T> Collection<T> grep(T[] self, Object filter)
    Iterates over the array of items and returns a collection of items that match the given filter - calling the ``isCase(java.lang.Object, java.lang.Object)`` method used by switch statements. This method can be used with different kinds of filters like regular expressions, classes, ranges etc. Example:

         def items = ['a', 'b', 'aa', 'bc', 3, 4.5] as Object[]
         assert items.grep( ~/a+/ )  == ['a', 'aa']
         assert items.grep( ~/../ )  == ['aa', 'bc']
         assert items.grep( Number ) == [ 3, 4.5 ]
         assert items.grep{ it.toString().size() == 1 } == [ 'a', 'b', 3 ]

    Parameters:
      `self` - an array
      `filter` - the filter to perform on each element of the array (using the `isCase(java.lang.Object, java.lang.Object)` method)
    Returns:
      a collection of objects which match the filter
    Since:
      2.0

  - ### grep

    public static Collection grep(Object self)
    Iterates over the collection of items which this Object represents and returns each item that matches using the IDENTITY Closure as a filter - effectively returning all elements which satisfy Groovy truth.

    Example:

         def items = [1, 2, 0, false, true, '', 'foo', [], [4, 5], null]
         assert items.grep() == [1, 2, true, 'foo', [4, 5]]

    Parameters:
      `self` - the object over which we iterate
    Returns:
      a collection of objects which match the filter
    Since:
      1.8.1
    See Also:
      - `Closure.IDENTITY`

  - ### grep

    public static <T> Collection<T> grep(Collection<T> self)
    Iterates over the collection returning each element that matches using the IDENTITY Closure as a filter - effectively returning all elements which satisfy Groovy truth.

    Example:

         def items = [1, 2, 0, false, true, '', 'foo', [], [4, 5], null]
         assert items.grep() == [1, 2, true, 'foo', [4, 5]]

    Parameters:
      `self` - a Collection
    Returns:
      a collection of elements satisfy Groovy truth
    Since:
      2.0
    See Also:
      - `Closure.IDENTITY`

  - ### grep

    public static <T> List<T> grep(List<T> self)
    Iterates over the collection returning each element that matches using the IDENTITY Closure as a filter - effectively returning all elements which satisfy Groovy truth.

    Example:

         def items = [1, 2, 0, false, true, '', 'foo', [], [4, 5], null]
         assert items.grep() == [1, 2, true, 'foo', [4, 5]]

    Parameters:
      `self` - a List
    Returns:
      a List of elements satisfy Groovy truth
    Since:
      2.4.0
    See Also:
      - `Closure.IDENTITY`

  - ### grep

    public static <T> Set<T> grep(Set<T> self)
    Iterates over the collection returning each element that matches using the IDENTITY Closure as a filter - effectively returning all elements which satisfy Groovy truth.

    Example:

         def items = [1, 2, 0, false, true, '', 'foo', [], [4, 5], null] as Set
         assert items.grep() == [1, 2, true, 'foo', [4, 5]] as Set

    Parameters:
      `self` - a Set
    Returns:
      a Set of elements satisfy Groovy truth
    Since:
      2.4.0
    See Also:
      - `Closure.IDENTITY`

  - ### grep

    public static <T> Collection<T> grep(T[] self)
    Iterates over the array returning each element that matches using the IDENTITY Closure as a filter - effectively returning all elements which satisfy Groovy truth.

    Example:

         def items = [1, 2, 0, false, true, '', 'foo', [], [4, 5], null] as Object[]
         assert items.grep() == [1, 2, true, 'foo', [4, 5]]

    Parameters:
      `self` - an array
    Returns:
      a collection of elements which satisfy Groovy truth
    Since:
      2.0
    See Also:
      - `Closure.IDENTITY`

  - ### count

    public static Number count(Iterator self, Object value)
    Counts the number of occurrences of the given value from the items within this Iterator. Comparison is done using Groovy's == operator (using `compareTo(value) == 0` or `equals(value)` ). The iterator will become exhausted of elements after determining the count value.
    Parameters:
      `self` - the Iterator from which we count the number of matching occurrences
      `value` - the value being searched for
    Returns:
      the number of occurrences
    Since:
      1.5.0

  - ### count

    public static <T> Number count(Iterator<T> self, Closure closure)
    Counts the number of occurrences which satisfy the given closure from the items within this Iterator. The iterator will become exhausted of elements after determining the count value.

    Example usage:

        assert [2,4,2,1,3,5,2,4,3].toSet().iterator().count{ it % 2 == 0 } == 2

    Parameters:
      `self` - the Iterator from which we count the number of matching occurrences
      `closure` - a closure condition
    Returns:
      the number of occurrences
    Since:
      1.8.0

  - ### count

    public static Number count(Iterable self, Object value)
    Counts the number of occurrences of the given value inside this Iterable. Comparison is done using Groovy's == operator (using `compareTo(value) == 0` or `equals(value)` ).

    Example usage:

        assert [2,4,2,1,3,5,2,4,3].count(4) == 2

    Parameters:
      `self` - the Iterable within which we count the number of occurrences
      `value` - the value being searched for
    Returns:
      the number of occurrences
    Since:
      2.2.0

  - ### count

    public static <T> Number count(Iterable<T> self, Closure closure)
    Counts the number of occurrences which satisfy the given closure from inside this Iterable.

    Example usage:

        assert [2,4,2,1,3,5,2,4,3].count{ it % 2 == 0 } == 5

    Parameters:
      `self` - the Iterable within which we count the number of occurrences
      `closure` - a closure condition
    Returns:
      the number of occurrences
    Since:
      2.2.0

  - ### count

    public static <K, V> Number count(Map<K,V> self, Closure<?> closure)
    Counts the number of occurrences which satisfy the given closure from inside this map. If the closure takes one parameter then it will be passed the Map.Entry. Otherwise, the closure should take two parameters and will be passed the key and value.

    Example usage:

        assert [a:1, b:1, c:2, d:2].count{ k,v -> k == 'a' || v == 2 } == 3

    Parameters:
      `self` - the map within which we count the number of occurrences
      `closure` - a 1 or 2 arg Closure condition applying on the entries
    Returns:
      the number of occurrences
    Since:
      1.8.0

  - ### count

    public static Number count(Object[] self, Object value)
    Counts the number of occurrences of the given value inside this array. Comparison is done using Groovy's == operator (using `compareTo(value) == 0` or `equals(value)` ).
    Parameters:
      `self` - the array within which we count the number of occurrences
      `value` - the value being searched for
    Returns:
      the number of occurrences
    Since:
      1.6.4

  - ### count

    public static <T> Number count(T[] self, Closure closure)
    Counts the number of occurrences which satisfy the given closure from inside this array.
    Parameters:
      `self` - the array within which we count the number of occurrences
      `closure` - a closure condition
    Returns:
      the number of occurrences
    Since:
      1.8.0

  - ### count

    public static Number count(int[] self, Object value)
    Counts the number of occurrences of the given value inside this array. Comparison is done using Groovy's == operator (using `compareTo(value) == 0` or `equals(value)` ).
    Parameters:
      `self` - the array within which we count the number of occurrences
      `value` - the value being searched for
    Returns:
      the number of occurrences
    Since:
      1.6.4

  - ### count

    public static Number count(long[] self, Object value)
    Counts the number of occurrences of the given value inside this array. Comparison is done using Groovy's == operator (using `compareTo(value) == 0` or `equals(value)` ).
    Parameters:
      `self` - the array within which we count the number of occurrences
      `value` - the value being searched for
    Returns:
      the number of occurrences
    Since:
      1.6.4

  - ### count

    public static Number count(short[] self, Object value)
    Counts the number of occurrences of the given value inside this array. Comparison is done using Groovy's == operator (using `compareTo(value) == 0` or `equals(value)` ).
    Parameters:
      `self` - the array within which we count the number of occurrences
      `value` - the value being searched for
    Returns:
      the number of occurrences
    Since:
      1.6.4

  - ### count

    public static Number count(char[] self, Object value)
    Counts the number of occurrences of the given value inside this array. Comparison is done using Groovy's == operator (using `compareTo(value) == 0` or `equals(value)` ).
    Parameters:
      `self` - the array within which we count the number of occurrences
      `value` - the value being searched for
    Returns:
      the number of occurrences
    Since:
      1.6.4

  - ### count

    public static Number count(boolean[] self, Object value)
    Counts the number of occurrences of the given value inside this array. Comparison is done using Groovy's == operator (using `compareTo(value) == 0` or `equals(value)` ).
    Parameters:
      `self` - the array within which we count the number of occurrences
      `value` - the value being searched for
    Returns:
      the number of occurrences
    Since:
      1.6.4

  - ### count

    public static Number count(double[] self, Object value)
    Counts the number of occurrences of the given value inside this array. Comparison is done using Groovy's == operator (using `compareTo(value) == 0` or `equals(value)` ).
    Parameters:
      `self` - the array within which we count the number of occurrences
      `value` - the value being searched for
    Returns:
      the number of occurrences
    Since:
      1.6.4

  - ### count

    public static Number count(float[] self, Object value)
    Counts the number of occurrences of the given value inside this array. Comparison is done using Groovy's == operator (using `compareTo(value) == 0` or `equals(value)` ).
    Parameters:
      `self` - the array within which we count the number of occurrences
      `value` - the value being searched for
    Returns:
      the number of occurrences
    Since:
      1.6.4

  - ### count

    public static Number count(byte[] self, Object value)
    Counts the number of occurrences of the given value inside this array. Comparison is done using Groovy's == operator (using `compareTo(value) == 0` or `equals(value)` ).
    Parameters:
      `self` - the array within which we count the number of occurrences
      `value` - the value being searched for
    Returns:
      the number of occurrences
    Since:
      1.6.4

  - ### toList

    public static <T> List<T> toList(Iterator<T> self)
    Convert an iterator to a List. The iterator will become exhausted of elements after making this conversion.
    Parameters:
      `self` - an iterator
    Returns:
      a List
    Since:
      1.5.0

  - ### toList

    public static <T> List<T> toList(Iterable<T> self)
    Convert an Iterable to a List. The Iterable's iterator will become exhausted of elements after making this conversion.

    Example usage:

        def x = [1,2,3] as HashSet
         assert x.class == HashSet
         assert x.toList() instanceof List

    Parameters:
      `self` - an Iterable
    Returns:
      a List
    Since:
      1.8.7

  - ### toList

    public static <T> List<T> toList(Enumeration<T> self)
    Convert an enumeration to a List.
    Parameters:
      `self` - an enumeration
    Returns:
      a List
    Since:
      1.5.0

  - ### collate

    public static <T> List<List<T>> collate(Iterable<T> self, int size)
    Collates this iterable into sub-lists of length `size`. Example:

        def list = [ 1, 2, 3, 4, 5, 6, 7 ]
         def coll = list.collate( 3 )
         assert coll == [ [ 1, 2, 3 ], [ 4, 5, 6 ], [ 7 ] ]

    Parameters:
      `self` - an Iterable
      `size` - the length of each sub-list in the returned list
    Returns:
      a List containing the data collated into sub-lists
    Since:
      2.4.0

  - ### collate

    public static <T> List<List<T>> collate(T[] self, int size)
    Collates an array.
    Parameters:
      `self` - an array
      `size` - the length of each sub-list in the returned list
    Returns:
      a List containing the array values collated into sub-lists
    Since:
      2.5.0
    See Also:
      - `collate(Iterable, int)`

  - ### collate

    public static <T> List<List<T>> collate(Iterable<T> self, int size, int step)
    Collates this iterable into sub-lists of length `size` stepping through the code `step` elements for each subList. Example:

        def list = [ 1, 2, 3, 4 ]
         def coll = list.collate( 3, 1 )
         assert coll == [ [ 1, 2, 3 ], [ 2, 3, 4 ], [ 3, 4 ], [ 4 ] ]

    Parameters:
      `self` - an Iterable
      `size` - the length of each sub-list in the returned list
      `step` - the number of elements to step through for each sub-list
    Returns:
      a List containing the data collated into sub-lists
    Since:
      2.4.0

  - ### collate

    public static <T> List<List<T>> collate(T[] self, int size, int step)
    Collates an array into sub-lists.
    Parameters:
      `self` - an array
      `size` - the length of each sub-list in the returned list
      `step` - the number of elements to step through for each sub-list
    Returns:
      a List containing the array elements collated into sub-lists
    Since:
      2.5.0
    See Also:
      - `collate(Iterable, int, int)`

  - ### collate

    public static <T> List<List<T>> collate(Iterable<T> self, int size, boolean keepRemainder)
    Collates this iterable into sub-lists of length `size`. Any remaining elements in the iterable after the subdivision will be dropped if `keepRemainder` is false. Example:

        def list = [ 1, 2, 3, 4, 5, 6, 7 ]
         def coll = list.collate( 3, false )
         assert coll == [ [ 1, 2, 3 ], [ 4, 5, 6 ] ]

    Parameters:
      `self` - an Iterable
      `size` - the length of each sub-list in the returned list
      `keepRemainder` - if true, any remaining elements are returned as sub-lists. Otherwise they are discarded
    Returns:
      a List containing the data collated into sub-lists
    Since:
      2.4.0

  - ### collate

    public static <T> List<List<T>> collate(T[] self, int size, boolean keepRemainder)
    Collates this array into sub-lists.
    Parameters:
      `self` - an array
      `size` - the length of each sub-list in the returned list
      `keepRemainder` - if true, any remaining elements are returned as sub-lists. Otherwise they are discarded
    Returns:
      a List containing the array elements collated into sub-lists
    Since:
      2.5.0
    See Also:
      - `collate(Iterable, int, boolean)`

  - ### collate

    public static <T> List<List<T>> collate(Iterable<T> self, int size, int step, boolean keepRemainder)
    Collates this iterable into sub-lists of length `size` stepping through the code `step` elements for each sub-list. Any remaining elements in the iterable after the subdivision will be dropped if `keepRemainder` is false. Example:

         def list = [ 1, 2, 3, 4 ]
         assert list.collate( 2, 2, true  ) == [ [ 1, 2 ], [ 3, 4 ] ]
         assert list.collate( 3, 1, true  ) == [ [ 1, 2, 3 ], [ 2, 3, 4 ], [ 3, 4 ], [ 4 ] ]
         assert list.collate( 3, 1, false ) == [ [ 1, 2, 3 ], [ 2, 3, 4 ] ]

    Parameters:
      `self` - an Iterable
      `size` - the length of each sub-list in the returned list
      `step` - the number of elements to step through for each sub-list
      `keepRemainder` - if true, any remaining elements are returned as sub-lists. Otherwise they are discarded
    Returns:
      a List containing the data collated into sub-lists
    Throws:
      `IllegalArgumentException` - if the step is zero.
    Since:
      2.4.0

  - ### collate

    public static <T> List<List<T>> collate(T[] self, int size, int step, boolean keepRemainder)
    Collates this array into sub-lists.
    Parameters:
      `self` - an array
      `size` - the length of each sub-list in the returned list
      `step` - the number of elements to step through for each sub-list
      `keepRemainder` - if true, any remaining elements are returned as sub-lists. Otherwise they are discarded
    Returns:
      a List containing the array elements collated into sub-lists
    Since:
      2.5.0

  - ### collect

    public static Collection collect(Object self)
    Iterates through this aggregate Object transforming each item into a new value using Closure.IDENTITY as a transformer, basically returning a list of items copied from the original object.

        assert [1,2,3] == [1,2,3].iterator().collect()

    Parameters:
      `self` - an aggregate Object with an Iterator returning its items
    Returns:
      a Collection of the transformed values
    Since:
      1.8.5
    See Also:
      - `Closure.IDENTITY`

  - ### collect

    public static <T> List<T> collect(Object self, Closure<T> transform)
    Iterates through this aggregate Object transforming each item into a new value using the `transform` closure, returning a list of transformed values. Example:

        def list = [1, 'a', 1.23, true ]
         def types = list.collect { it.class }
         assert types == [Integer, String, BigDecimal, Boolean]

    Parameters:
      `self` - an aggregate Object with an Iterator returning its items
      `transform` - the closure used to transform each item of the aggregate object
    Returns:
      a List of the transformed values
    Since:
      1.0

  - ### collect

    public static <T, C extends Collection<T>> C collect(Object self, C collector, Closure<? extends T> transform)
    Iterates through this aggregate Object transforming each item into a new value using the `transform` closure and adding it to the supplied `collector`.
    Parameters:
      `self` - an aggregate Object with an Iterator returning its items
      `collector` - the Collection to which the transformed values are added
      `transform` - the closure used to transform each item of the aggregate object
    Returns:
      the collector with all transformed values added to it
    Since:
      1.0

  - ### collect

    public static <E, T> List<T> collect(E[] self, Closure<T> transform)
    Iterates through this Array transforming each item into a new value using the `transform` closure, returning a list of transformed values.
    Parameters:
      `self` - an Array
      `transform` - the closure used to transform each item of the Array
    Returns:
      a List of the transformed values
    Since:
      2.5.0

  - ### collect

    public static <E, T, C extends Collection<T>> C collect(E[] self, C collector, Closure<? extends T> transform)
    Iterates through this Array transforming each item into a new value using the `transform` closure and adding it to the supplied `collector`.

         Integer[] nums = [1,2,3]
         List answer = []
         nums.collect(answer) { it * 2 }
         assert [2,4,6] == answer

    Parameters:
      `self` - an Array
      `collector` - the Collection to which the transformed values are added
      `transform` - the closure used to transform each item
    Returns:
      the collector with all transformed values added to it
    Since:
      2.5.0

  - ### collect

    public static <E, T> List<T> collect(Iterator<E> self, Closure<T> transform)
    Iterates through this Iterator transforming each item into a new value using the `transform` closure, returning a list of transformed values.
    Parameters:
      `self` - an Iterator
      `transform` - the closure used to transform each item
    Returns:
      a List of the transformed values
    Since:
      2.5.0

  - ### collect

    public static <E, T, C extends Collection<T>> C collect(Iterator<E> self, C collector, Closure<? extends T> transform)
    Iterates through this Iterator transforming each item into a new value using the `transform` closure and adding it to the supplied `collector`.
    Parameters:
      `self` - an Iterator
      `collector` - the Collection to which the transformed values are added
      `transform` - the closure used to transform each item
    Returns:
      the collector with all transformed values added to it
    Since:
      2.5.0

  - ### collect

    public static <T> List<T> collect(Iterable<T> self)
    Iterates through this collection transforming each entry into a new value using Closure.IDENTITY as a transformer, basically returning a list of items copied from the original collection.

        assert [1,2,3] == [1,2,3].collect()

    Parameters:
      `self` - an Iterable
    Returns:
      a List of the transformed values
    Since:
      2.5.0
    See Also:
      - `Closure.IDENTITY`

  - ### collect

    public static <E, T> List<T> collect(Iterable<E> self, Closure<T> transform)
    Iterates through this Iterable transforming each entry into a new value using the `transform` closure returning a list of transformed values.

        assert [2,4,6] == [1,2,3].collect { it * 2 }

    Parameters:
      `self` - an Iterable
      `transform` - the closure used to transform each item of the collection
    Returns:
      a List of the transformed values
    Since:
      2.5.0

  - ### collect

    public static <E, T, C extends Collection<T>> C collect(Iterable<E> self, C collector, Closure<? extends T> transform)
    Iterates through this collection transforming each value into a new value using the `transform` closure and adding it to the supplied `collector`.

        assert [1,2,3] as HashSet == [2,4,5,6].collect(new HashSet()) { (int)(it / 2) }

    Parameters:
      `self` - an Iterable
      `collector` - the Collection to which the transformed values are added
      `transform` - the closure used to transform each item
    Returns:
      the collector with all transformed values added to it
    Since:
      2.5.0

  - ### collectNested

    public static List collectNested(Collection self, Closure transform)
    Recursively iterates through this collection transforming each non-Collection value into a new value using the closure as a transformer. Returns a potentially nested list of transformed values.

         assert [2,[4,6],[8],[]] == [1,[2,3],[4],[]].collectNested { it * 2 }

    Parameters:
      `self` - a collection
      `transform` - the closure used to transform each item of the collection
    Returns:
      the resultant collection
    Since:
      1.8.1

  - ### collectNested

    public static List collectNested(Iterable self, Closure transform)
    Recursively iterates through this Iterable transforming each non-Collection value into a new value using the closure as a transformer. Returns a potentially nested list of transformed values.

         assert [2,[4,6],[8],[]] == [1,[2,3],[4],[]].collectNested { it * 2 }

    Parameters:
      `self` - an Iterable
      `transform` - the closure used to transform each item of the Iterable
    Returns:
      the resultant list
    Since:
      2.2.0

  - ### collectNested

    public static <C extends Collection> C collectNested(Iterable self, C collector, Closure transform)
    Recursively iterates through this Iterable transforming each non-Collection value into a new value using the `transform` closure. Returns a potentially nested collection of transformed values.

         def x = [1,[2,3],[4],[]].collectNested(new Vector()) { it * 2 }
         assert x == [2,[4,6],[8],[]]
         assert x instanceof Vector

    Parameters:
      `self` - an Iterable
      `collector` - an initial Collection to which the transformed values are added
      `transform` - the closure used to transform each element of the Iterable
    Returns:
      the collector with all transformed values added to it
    Since:
      2.2.0

  - ### collectMany

    public static <T, E> List<T> collectMany(Iterable<E> self, Closure<? extends Collection<? extends T>> projection)
    Projects each item from a source Iterable to a collection and concatenates (flattens) the resulting collections into a single list.

         def nums = 1..10
         def squaresAndCubesOfEvens = nums.collectMany{ it % 2 ? [] : [it**2, it**3] }
         assert squaresAndCubesOfEvens == [4, 8, 16, 64, 36, 216, 64, 512, 100, 1000]

         def animals = ['CAT', 'DOG', 'ELEPHANT'] as Set
         def smallAnimals = animals.collectMany{ it.size() > 3 ? [] : [it.toLowerCase()] }
         assert smallAnimals == ['cat', 'dog']

         def orig = nums as Set
         def origPlusIncrements = orig.collectMany{ [it, it+1] }
         assert origPlusIncrements.size() == orig.size() * 2
         assert origPlusIncrements.unique().size() == orig.size() + 1

    Parameters:
      `self` - an Iterable
      `projection` - a projecting Closure returning a collection of items
    Returns:
      a list created from the projected collections concatenated (flattened) together
    Since:
      2.2.0
    See Also:
      - `sum(java.lang.Iterable, groovy.lang.Closure)`

  - ### collectMany

    public static <T, E, C extends Collection<T>> C collectMany(Iterable<E> self, C collector, Closure<? extends Collection<? extends T>> projection)
    Projects each item from a source collection to a result collection and concatenates (flattens) the resulting collections adding them into the `collector`.

         def animals = ['CAT', 'DOG', 'ELEPHANT']
         def smallAnimals = animals.collectMany(['ant', 'bee']){ it.size() > 3 ? [] : [it.toLowerCase()] }
         assert smallAnimals == ['ant', 'bee', 'cat', 'dog']

         def nums = 1..5
         def origPlusIncrements = nums.collectMany([] as Set){ [it, it+1] }
         assert origPlusIncrements.size() == nums.size() + 1

         @groovy.transform.TypeChecked void test() {
           LinkedHashSet<String> lhs = ['abc','def'].collectMany(new LinkedHashSet<>()){ it.iterator().collect() }
           assert lhs == ['a','b','c','d','e','f'] as Set<String>
         }
         test()

    Parameters:
      `self` - an Iterable
      `collector` - an initial collection to add the projected items to
      `projection` - a projecting Closure returning a collection of items
    Returns:
      the collector with the projected collections concatenated (flattened) into it
    Since:
      2.2.0

  - ### collectMany

    public static <T, K, V, C extends Collection<T>> C collectMany(Map<K,V> self, C collector, Closure<? extends Collection<? extends T>> projection)
    Projects each item from a source map to a result collection and concatenates (flattens) the resulting collections adding them into the `collector`.

         def map = [bread:3, milk:5, butter:2]
         def result = map.collectMany(['x']){ k, v -> k.startsWith('b') ? k.toList() : [] }
         assert result == ['x', 'b', 'r', 'e', 'a', 'd', 'b', 'u', 't', 't', 'e', 'r']

    Parameters:
      `self` - a map
      `collector` - an initial collection to add the projected items to
      `projection` - a projecting Closure returning a collection of items
    Returns:
      the collector with the projected collections concatenated (flattened) to it
    Since:
      1.8.8

  - ### collectMany

    public static <T, K, V> List<T> collectMany(Map<K,V> self, Closure<? extends Collection<? extends T>> projection)
    Projects each item from a source map to a result collection and concatenates (flattens) the resulting collections adding them into a collection.

         def map = [bread:3, milk:5, butter:2]
         def result = map.collectMany{ k, v -> k.startsWith('b') ? k.toList() : [] }
         assert result == ['b', 'r', 'e', 'a', 'd', 'b', 'u', 't', 't', 'e', 'r']

    Parameters:
      `self` - a map
      `projection` - a projecting Closure returning a collection of items
    Returns:
      a list created from the projected collections concatenated (flattened) together
    Since:
      1.8.8

  - ### collectMany$$bridge

    @Deprecated public static <T, K, V> Collection<T> collectMany$$bridge(Map<K,V> self, Closure<? extends Collection<? extends T>> projection)
    Deprecated.

  - ### collectMany

    public static <T, E> List<T> collectMany(E[] self, Closure<? extends Collection<? extends T>> projection)
    Projects each item from a source array to a collection and concatenates (flattens) the resulting collections into a single list.

         def nums = [1, 2, 3, 4, 5, 6] as Object[]
         def squaresAndCubesOfEvens = nums.collectMany{ it % 2 ? [] : [it**2, it**3] }
         assert squaresAndCubesOfEvens == [4, 8, 16, 64, 36, 216]

    Parameters:
      `self` - an array
      `projection` - a projecting Closure returning a collection of items
    Returns:
      a list created from the projected collections concatenated (flattened) together
    Since:
      1.8.1
    See Also:
      - `sum(Object[], groovy.lang.Closure)`

  - ### collectMany

    public static <T, E, C extends Collection<T>> C collectMany(E[] self, C collector, Closure<? extends Collection<? extends T>> projection)
    Projects each item from a source array to a collection and concatenates (flattens) the resulting collections into a single list.

         def nums = [1, 2, 3, 4, 5, 6] as Object[]
         def squaresAndCubesOfEvens = nums.collectMany{ it % 2 ? [] : [it**2, it**3] }
         assert squaresAndCubesOfEvens == [4, 8, 16, 64, 36, 216]

    Parameters:
      `self` - an array
      `collector` - an initial collection to add the projected items to
      `projection` - a projecting Closure returning a collection of items
    Returns:
      the collector with the projected collections concatenated (flattened) to it
    Since:
      1.8.1
    See Also:
      - `sum(Object[], groovy.lang.Closure)`

  - ### collectMany

    public static <T, E, C extends Collection<T>> C collectMany(Iterator<E> self, C collector, Closure<? extends Collection<? extends T>> projection)
    Projects each item from a source iterator to a collection and concatenates (flattens) the resulting collections into a single list.

         def numsIter = [1, 2, 3, 4, 5, 6].iterator()
         def squaresAndCubesOfEvens = numsIter.collectMany{ it % 2 ? [] : [it**2, it**3] }
         assert squaresAndCubesOfEvens == [4, 8, 16, 64, 36, 216]

    Parameters:
      `self` - an iterator
      `collector` - an initial collection to add the projected items to
      `projection` - a projecting Closure returning a collection of items
    Returns:
      the collector with the projected collections concatenated (flattened) to it
    Since:
      1.8.1
    See Also:
      - `sum(Iterator, groovy.lang.Closure)`

  - ### collectMany

    public static <T, E> List<T> collectMany(Iterator<E> self, Closure<? extends Collection<? extends T>> projection)
    Projects each item from a source iterator to a collection and concatenates (flattens) the resulting collections into a single list.

         def numsIter = [1, 2, 3, 4, 5, 6].iterator()
         def squaresAndCubesOfEvens = numsIter.collectMany{ it % 2 ? [] : [it**2, it**3] }
         assert squaresAndCubesOfEvens == [4, 8, 16, 64, 36, 216]

    Parameters:
      `self` - an iterator
      `projection` - a projecting Closure returning a collection of items
    Returns:
      a list created from the projected collections concatenated (flattened) together
    Since:
      1.8.1
    See Also:
      - `collectMany(Iterator, Collection, groovy.lang.Closure)`

  - ### collect

    public static <T, K, V, C extends Collection<T>> C collect(Map<K,V> self, C collector, Closure<? extends T> transform)
    Iterates through this Map transforming each map entry into a new value using the `transform` closure returning the `collector` with all transformed values added to it.

        assert [a:1, b:2].collect( [] as HashSet ) { key, value -> key*value } == ["a", "bb"] as Set
         assert [3:20, 2:30].collect( [] as HashSet ) { entry -> entry.key * entry.value } == [60] as Set

    Parameters:
      `self` - a Map
      `collector` - the Collection to which transformed values are added
      `transform` - the transformation closure which can take one (Map.Entry) or two (key, value) parameters
    Returns:
      the collector with all transformed values added to it
    Since:
      1.0

  - ### collect

    public static <T, K, V> List<T> collect(Map<K,V> self, Closure<T> transform)
    Iterates through this Map transforming each map entry into a new value using the `transform` closure returning a list of transformed values.

        assert [a:1, b:2].collect { key, value -> key*value } == ["a", "bb"]
         assert [3:20, 2:30].collect { entry -> entry.key * entry.value } == [60, 60]

    Parameters:
      `self` - a Map
      `transform` - the transformation closure which can take one (Map.Entry) or two (key, value) parameters
    Returns:
      the resultant list of transformed values
    Since:
      1.0

  - ### collectEntries

    public static <K, V, X, Y> Map<K,V> collectEntries(Map<X,Y> self, Map<K,V> collector, Closure<?> transform)
    Iterates through this Map transforming each map entry using the `transform` closure returning a map of the transformed entries.

         assert [a:1, b:2].collectEntries( [:] ) { k, v -> [v, k] } == [1:'a', 2:'b']
         assert [a:1, b:2].collectEntries( [30:'C'] ) { key, value ->
             [(value*10): key.toUpperCase()] } == [10:'A', 20:'B', 30:'C']

    Note: When using the list-style of result, the behavior is '`def (key, value) = listResultFromClosure`'. While we strongly discourage using a list of size other than 2, Groovy's normal semantics apply in this case; throwing away elements after the second one and using null for the key or value for the case of a shortened list. If your collector Map doesn't support null keys or values, you might get a runtime error, e.g. NullPointerException or IllegalArgumentException.
    Parameters:
      `self` - a Map
      `collector` - the Map into which the transformed entries are put
      `transform` - the closure used for transforming, which can take one (Map.Entry) or two (key, value) parameters and should return a Map.Entry, a Map or a two-element list containing the resulting key and value
    Returns:
      the collector with all transformed values added to it
    Since:
      1.7.9
    See Also:
      - `collect(Map, Collection, Closure)`

  - ### collectEntries

    public static <K, V, X, Y> Map<K,V> collectEntries(Map<X,Y> self, Closure<?> transform)
    Iterates through this Map transforming each entry using the `transform` closure and returning a map of the transformed entries.

         assert [a:1, b:2].collectEntries { key, value -> [value, key] } == [1:'a', 2:'b']
         assert [a:1, b:2].collectEntries { key, value ->
             [(value*10): key.toUpperCase()] } == [10:'A', 20:'B']

    Note: When using the list-style of result, the behavior is '`def (key, value) = listResultFromClosure`'. While we strongly discourage using a list of size other than 2, Groovy's normal semantics apply in this case; throwing away elements after the second one and using null for the key or value for the case of a shortened list. If your Map doesn't support null keys or values, you might get a runtime error, e.g. NullPointerException or IllegalArgumentException.
    Parameters:
      `self` - a Map
      `transform` - the closure used for transforming, which can take one (Map.Entry) or two (key, value) parameters and should return a Map.Entry, a Map or a two-element list containing the resulting key and value
    Returns:
      a Map of the transformed entries
    Since:
      1.7.9
    See Also:
      - `collect(Map, Collection, Closure)`

  - ### collectEntries

    public static <K, V, E> Map<K,V> collectEntries(Iterator<E> self, Closure<?> transform)
    A variant of collectEntries for Iterators.
    Parameters:
      `self` - an Iterator
      `transform` - the closure used for transforming, which has an item from self as the parameter and should return a Map.Entry, a Map or a two-element list containing the resulting key and value
    Returns:
      a Map of the transformed entries
    Since:
      1.8.7
    See Also:
      - `collectEntries(Iterable, Closure)`

  - ### collectEntries

    public static <K, V, E> Map<K,V> collectEntries(Iterable<E> self, Closure<?> transform)
    Iterates through this Iterable transforming each item using the `transform` closure and returning a map of the resulting transformed entries.

         def letters = "abc"
         // collect letters with index using list style
         assert (0..2).collectEntries { index -> [index, letters[index]] } == [0:'a', 1:'b', 2:'c']
         // collect letters with index using map style
         assert (0..2).collectEntries { index -> [(index): letters[index]] } == [0:'a', 1:'b', 2:'c']

    Note: When using the list-style of result, the behavior is '`def (key, value) = listResultFromClosure`'. While we strongly discourage using a list of size other than 2, Groovy's normal semantics apply in this case; throwing away elements after the second one and using null for the key or value for the case of a shortened list.
    Parameters:
      `self` - an Iterable
      `transform` - the closure used for transforming, which has an item from self as the parameter and should return a Map.Entry, a Map or a two-element list containing the resulting key and value
    Returns:
      a Map of the transformed entries
    Since:
      1.8.7
    See Also:
      - `collectEntries(Iterator, Closure)`

  - ### collectEntries

    public static <K, V> Map<K,V> collectEntries(Iterator<?> self)
    A variant of collectEntries for Iterators using the identity closure as the transform.
    Parameters:
      `self` - an Iterator
    Returns:
      a Map of the transformed entries
    Since:
      1.8.7
    See Also:
      - `collectEntries(Iterable)`

  - ### collectEntries

    public static <K, V> Map<K,V> collectEntries(Iterable<?> self)
    A variant of collectEntries for Iterable objects using the identity closure as the transform. The source Iterable should contain a list of `[key, value]` tuples or `Map.Entry` objects.

         def nums = [1, 10, 100, 1000]
         def tuples = nums.collect{ [it, it.toString().size()] }
         assert tuples == [[1, 1], [10, 2], [100, 3], [1000, 4]]
         def map = tuples.collectEntries()
         assert map == [1:1, 10:2, 100:3, 1000:4]

    Parameters:
      `self` - an Iterable
    Returns:
      a Map of the transformed entries
    Since:
      1.8.7
    See Also:
      - `collectEntries(Iterator)`

  - ### collectEntries

    public static <K, V, E> Map<K,V> collectEntries(Iterator<E> self, Map<K,V> collector, Closure<?> transform)
    A variant of collectEntries for Iterators using a supplied map as the destination of transformed entries.
    Parameters:
      `self` - an Iterator
      `collector` - the Map into which the transformed entries are put
      `transform` - the closure used for transforming, which has an item from self as the parameter and should return a Map.Entry, a Map or a two-element list containing the resulting key and value
    Returns:
      the collector with all transformed values added to it
    Since:
      1.8.7

  - ### collectEntries

    public static <K, V, E> Map<K,V> collectEntries(Iterable<E> self, Map<K,V> collector, Closure<?> transform)
    Iterates through this Iterable transforming each item using the closure as a transformer into a map entry, returning the supplied map with all the transformed entries added to it.

         def letters = "abc"
         // collect letters with index
         assert (0..2).collectEntries( [:] ) { index -> [index, letters[index]] } == [0:'a', 1:'b', 2:'c']
         assert (0..2).collectEntries( [4:'d'] ) { index ->
             [(index+1): letters[index]] } == [1:'a', 2:'b', 3:'c', 4:'d']

    Note: When using the list-style of result, the behavior is '`def (key, value) = listResultFromClosure`'. While we strongly discourage using a list of size other than 2, Groovy's normal semantics apply in this case; throwing away elements after the second one and using null for the key or value for the case of a shortened list. If your collector Map doesn't support null keys or values, you might get a runtime error, e.g. NullPointerException or IllegalArgumentException.
    Parameters:
      `self` - an Iterable
      `collector` - the Map into which the transformed entries are put
      `transform` - the closure used for transforming, which has an item from self as the parameter and should return a Map.Entry, a Map or a two-element list containing the resulting key and value
    Returns:
      the collector with all transformed values added to it
    Since:
      1.8.7
    See Also:
      - `collectEntries(Iterator, Map, Closure)`

  - ### collectEntries

    public static <K, V> Map<K,V> collectEntries(Iterator<?> self, Map<K,V> collector)
    A variant of collectEntries for Iterators using the identity closure as the transform and a supplied map as the destination of transformed entries.
    Parameters:
      `self` - an Iterator
      `collector` - the Map into which the transformed entries are put
    Returns:
      the collector with all transformed values added to it
    Since:
      1.8.7
    See Also:
      - `collectEntries(Iterable, Map)`

  - ### collectEntries

    public static <K, V> Map<K,V> collectEntries(Iterable<?> self, Map<K,V> collector)
    A variant of collectEntries for Iterables using the identity closure as the transform and a supplied map as the destination of transformed entries.
    Parameters:
      `self` - an Iterable
      `collector` - the Map into which the transformed entries are put
    Returns:
      the collector with all transformed values added to it
    Since:
      1.8.7
    See Also:
      - `collectEntries(Iterator, Map)`

  - ### collectEntries

    public static <K, V, E> Map<K,V> collectEntries(E[] self, Map<K,V> collector, Closure<?> transform)
    Iterates through this array transforming each item using the `transform` closure and returning a map of the resulting transformed entries.

         def letters = "abc"
         def nums = [0, 1, 2] as Integer[]
         // collect letters with index
         assert nums.collectEntries( [:] ) { index -> [index, letters[index]] } == [0:'a', 1:'b', 2:'c']
         assert nums.collectEntries( [4:'d'] ) { index ->
             [(index+1): letters[index]] } == [1:'a', 2:'b', 3:'c', 4:'d']

    Note: When using the list-style of result, the behavior is '`def (key, value) = listResultFromClosure`'. While we strongly discourage using a list of size other than 2, Groovy's normal semantics apply in this case; throwing away elements after the second one and using null for the key or value for the case of a shortened list. If your collector Map doesn't support null keys or values, you might get a runtime error, e.g. NullPointerException or IllegalArgumentException.
    Parameters:
      `self` - an array
      `collector` - the Map into which the transformed entries are put
      `transform` - the closure used for transforming, which has an item from self as the parameter and should return a Map.Entry, a Map or a two-element list containing the resulting key and value
    Returns:
      the collector with all transformed values added to it
    Since:
      1.7.9
    See Also:
      - `collect(Map, Collection, Closure)`

  - ### collectEntries

    public static <K, V, E> Map<K,V> collectEntries(E[] self, Map<K,V> collector)
    A variant of collectEntries using the identity closure as the transform.
    Parameters:
      `self` - an array
      `collector` - the Map into which the transformed entries are put
    Returns:
      the collector with all transformed values added to it
    Since:
      1.8.5
    See Also:
      - `collectEntries(Object[], Map, Closure)`

  - ### collectEntries

    public static <K, V, E> Map<K,V> collectEntries(E[] self, Closure<?> transform)
    Iterates through this array transforming each item using the `transform` closure and returning a map of the resulting transformed entries.

         def letters = "abc"
         def nums = [0, 1, 2] as Integer[]
         // collect letters with index using list style
         assert nums.collectEntries { index -> [index, letters[index]] } == [0:'a', 1:'b', 2:'c']
         // collect letters with index using map style
         assert nums.collectEntries { index -> [(index): letters[index]] } == [0:'a', 1:'b', 2:'c']

    Note: When using the list-style of result, the behavior is '`def (key, value) = listResultFromClosure`'. While we strongly discourage using a list of size other than 2, Groovy's normal semantics apply in this case; throwing away elements after the second one and using null for the key or value for the case of a shortened list.
    Parameters:
      `self` - a Collection
      `transform` - the closure used for transforming, which has an item from self as the parameter and should return a Map.Entry, a Map or a two-element list containing the resulting key and value
    Returns:
      a Map of the transformed entries
    Since:
      1.7.9
    See Also:
      - `collectEntries(Iterator, Map, Closure)`

  - ### collectEntries

    public static <K, V, E> Map<K,V> collectEntries(E[] self)
    A variant of collectEntries using the identity closure as the transform.
    Parameters:
      `self` - an array
    Returns:
      the collector with all transformed values added to it
    Since:
      1.8.5
    See Also:
      - `collectEntries(Object[], Closure)`

  - ### find

    public static Object find(Object self, Closure closure)
    Finds the first value matching the closure condition.

         def numbers = [1, 2, 3]
         def result = numbers.find { it > 1}
         assert result == 2

    Parameters:
      `self` - an Object with an iterator returning its values
      `closure` - a closure condition
    Returns:
      the first Object found or null if none was found
    Since:
      1.0

  - ### find

    public static Object find(Object self)
    Finds the first item matching the IDENTITY Closure (i.e. matching Groovy truth).

    Example:

         def items = [null, 0, 0.0, false, '', [], 42, 43]
         assert items.find() == 42

    Parameters:
      `self` - an Object with an Iterator returning its values
    Returns:
      the first Object found or null if none was found
    Since:
      1.8.1
    See Also:
      - `Closure.IDENTITY`

  - ### find

    public static <T> T find(Collection<T> self, Closure closure)
    Finds the first value matching the closure condition. Example:

        def list = [1,2,3]
         assert 2 == list.find { it > 1 }

    Parameters:
      `self` - a Collection
      `closure` - a closure condition
    Returns:
      the first Object found, in the order of the collections iterator, or null if no element matches
    Since:
      1.0

  - ### find

    public static <T> T find(T[] self, Closure condition)
    Finds the first element in the array that matches the given closure condition. Example:

         def list = [1,2,3] as Integer[]
         assert 2 == list.find { it > 1 }
         assert null == list.find { it > 5 }

    Parameters:
      `self` - an Array
      `condition` - a closure condition
    Returns:
      the first element from the array that matches the condition or null if no element matches
    Since:
      2.0

  - ### find

    public static <T> T find(Collection<T> self)
    Finds the first item matching the IDENTITY Closure (i.e. matching Groovy truth).

    Example:

         def items = [null, 0, 0.0, false, '', [], 42, 43]
         assert items.find() == 42

    Parameters:
      `self` - a Collection
    Returns:
      the first Object found or null if none was found
    Since:
      1.8.1
    See Also:
      - `Closure.IDENTITY`

  - ### findResult

    public static Object findResult(Object self, Closure condition)
    Treats the object as iterable, iterating through the values it represents and returns the first non-null result obtained from calling the closure, otherwise returns null.

         int[] numbers = [1, 2, 3]
         assert numbers.findResult { if(it > 1) return it } == 2
         assert numbers.findResult { if(it > 4) return it } == null

    Parameters:
      `self` - an Object with an iterator returning its values
      `condition` - a closure that returns a non-null value to indicate that processing should stop and the value should be returned
    Returns:
      the first non-null result of the closure
    Since:
      1.7.5

  - ### findResult

    public static Object findResult(Object self)
    Treats the object as iterable, iterating through the values it represents and returns the first non-null value, otherwise returns null.

         class Foo {
             List items
             Iterator iterator() {
                 items.iterator()
             }
         }
         assert new Foo(items: [null, 2, 4]).findResult() == 2
         assert new Foo(items: [null, null]).findResult() == null

    Parameters:
      `self` - an Object with an iterator returning its values
    Returns:
      the first non-null result of the closure
    Since:
      4.0.9

  - ### findResult

    public static Object findResult(Object self, Object defaultResult, Closure condition)
    Treats the object as iterable, iterating through the values it represents and returns the first non-null result obtained from calling the closure, otherwise returns the defaultResult.

         int[] numbers = [1, 2, 3]
         assert numbers.findResult(5) { if(it > 1) return it } == 2
         assert numbers.findResult(5) { if(it > 4) return it } == 5

    Parameters:
      `self` - an Object with an iterator returning its values
      `defaultResult` - an Object that should be returned if all closure results are null
      `condition` - a closure that returns a non-null value to indicate that processing should stop and the value should be returned
    Returns:
      the first non-null result of the closure, otherwise the default value
    Since:
      1.7.5

  - ### findResult

    public static Object findResult(Object self, Object defaultResult)
    Treats the object as iterable, iterating through the values it represents and returns the first non-null result, otherwise returns the defaultResult.

         class Foo {
             List items
             Iterator iterator() {
                 items.iterator()
             }
         }
         assert new Foo(items: [null, 2, 4]).findResult(5) == 2
         assert new Foo(items: [null, null]).findResult(5) == 5

    Parameters:
      `self` - an Object with an iterator returning its values
      `defaultResult` - an Object that should be returned if all elements are null
    Returns:
      the first non-null element, otherwise the default value
    Since:
      4.0.9

  - ### findResult

    public static <S, T, U extends T, V extends T> T findResult(Iterator<S> self, U defaultResult, Closure<V> condition)
    Iterates through the Iterator calling the given closure condition for each item but stopping once the first non-null result is found and returning that result. If all are null, the defaultResult is returned.

    Examples:

         def iter = [1,2,3].iterator()
         assert "Found 2" == iter.findResult("default") { it > 1 ? "Found $it" : null }
         assert "default" == iter.findResult("default") { it > 3 ? "Found $it" : null }

    Parameters:
      `self` - an Iterator
      `defaultResult` - an Object that should be returned if all closure results are null
      `condition` - a closure that returns a non-null value to indicate that processing should stop and the value should be returned
    Returns:
      the first non-null result from calling the closure, or the defaultValue
    Since:
      2.5.0

  - ### findResult

    public static <T, U extends T, V extends T> T findResult(Iterator<U> self, V defaultResult)
    Iterates through the Iterator stopping once the first non-null result is found and returning that result. If all are null, the defaultResult is returned.

    Examples:

         assert [null, 1, 2].iterator().findResult('default') == 1
         assert [null, null].findResult('default') == 'default'

    Parameters:
      `self` - an Iterator
      `defaultResult` - an Object that should be returned if all elements are null
    Returns:
      the first non-null result from the iterator, or the defaultValue
    Since:
      4.0.9

  - ### findResult

    public static <T, U> T findResult(Iterator<U> self, Closure<T> condition)
    Iterates through the Iterator calling the given closure condition for each item but stopping once the first non-null result is found and returning that result. If all results are null, null is returned.
    Parameters:
      `self` - an Iterator
      `condition` - a closure that returns a non-null value to indicate that processing should stop and the value should be returned
    Returns:
      the first non-null result from calling the closure, or null
    Since:
      2.5.0

  - ### findResult

    public static <T> T findResult(Iterator<T> self)
    Iterates through the Iterator stopping once the first non-null result is found and returning that result. If all results are null, null is returned.
    Parameters:
      `self` - an Iterator
    Returns:
      the first non-null result from the iterator, or null
    Since:
      4.0.9

  - ### findResult

    public static <S, T, U extends T, V extends T> T findResult(Iterable<S> self, U defaultResult, Closure<V> condition)
    Iterates through the Iterable calling the given closure condition for each item but stopping once the first non-null result is found and returning that result. If all are null, the defaultResult is returned.

    Examples:

         def list = [1,2,3]
         assert "Found 2" == list.findResult("default") { it > 1 ? "Found $it" : null }
         assert "default" == list.findResult("default") { it > 3 ? "Found $it" : null }

    Parameters:
      `self` - an Iterable
      `defaultResult` - an Object that should be returned if all closure results are null
      `condition` - a closure that returns a non-null value to indicate that processing should stop and the value should be returned
    Returns:
      the first non-null result from calling the closure, or the defaultValue
    Since:
      2.5.0

  - ### findResult

    public static <T, U extends T, V extends T> T findResult(Iterable<U> self, V defaultResult)
    Iterates through the Iterable calling the given closure condition for each item but stopping once the first non-null result is found and returning that result. If all are null, the defaultResult is returned.

    Examples:

         assert [null, 1, 2].findResult('default') == 1
         assert [null, null].findResult('default') == 'default'

    Parameters:
      `self` - an Iterable
      `defaultResult` - an Object that should be returned if all elements in the iterable are null
    Returns:
      the first non-null element from the iterable, or the defaultValue
    Since:
      4.0.9

  - ### findResult

    public static <T, U> T findResult(Iterable<U> self, Closure<T> condition)
    Iterates through the Iterable calling the given closure condition for each item but stopping once the first non-null result is found and returning that result. If all results are null, null is returned.
    Parameters:
      `self` - an Iterable
      `condition` - a closure that returns a non-null value to indicate that processing should stop and the value should be returned
    Returns:
      the first non-null result from calling the closure, or null
    Since:
      2.5.0

  - ### findResult

    public static <T> T findResult(Iterable<T> self)
    Iterates through the Iterable stopping once the first non-null result is found and returning that result. If all results are null, null is returned.
    Parameters:
      `self` - an Iterable
    Returns:
      the first non-null element from the iterable, or null
    Since:
      4.0.9

  - ### findResult

    public static <S, T, U extends T, V extends T> T findResult(S[] self, U defaultResult, Closure<V> condition)
    Iterates through the Array calling the given closure condition for each item but stopping once the first non-null result is found and returning that result. If all are null, the defaultResult is returned.
    Parameters:
      `self` - an Array
      `defaultResult` - an Object that should be returned if all closure results are null
      `condition` - a closure that returns a non-null value to indicate that processing should stop and the value should be returned
    Returns:
      the first non-null result from calling the closure, or the defaultValue
    Since:
      2.5.0

  - ### findResult

    public static <T, U extends T, V extends T> T findResult(U[] self, V defaultResult)
    Iterates through the Array stopping once the first non-null result is found and returning that result. If all are null, the defaultResult is returned.
    Parameters:
      `self` - an Array
      `defaultResult` - an Object that should be returned if all elements are null
    Returns:
      the first non-null result from calling the closure, or the defaultValue
    Since:
      4.0.9

  - ### findResult

    public static <S, T> T findResult(S[] self, Closure<T> condition)
    Iterates through the Array calling the given closure condition for each item but stopping once the first non-null result is found and returning that result. If all results are null, null is returned.
    Parameters:
      `self` - an Array
      `condition` - a closure that returns a non-null value to indicate that processing should stop and the value should be returned
    Returns:
      the first non-null result from calling the closure, or null
    Since:
      2.5.0

  - ### findResult

    public static <T> T findResult(T[] self)
    Iterates through the Array stopping once the first non-null result is found and returning that result. If all results are null, null is returned.
    Parameters:
      `self` - an Array
    Returns:
      the first non-null result from calling the closure, or null
    Since:
      4.0.9

  - ### findResult

    public static <T, K, V> T findResult(Map<K,V> self, Closure<T> condition)
    Returns the first non-null closure result found by passing each map entry to the closure, otherwise null is returned. If the closure takes two parameters, the entry key and value are passed. If the closure takes one parameter, the Map.Entry object is passed.

         assert "Found b:3" == [a:1, b:3].findResult { if (it.value == 3) return "Found ${it.key}:${it.value}" }
         assert null == [a:1, b:3].findResult { if (it.value == 9) return "Found ${it.key}:${it.value}" }
         assert "Found a:1" == [a:1, b:3].findResult { k, v -> if (k.size() + v == 2) return "Found $k:$v" }

    Parameters:
      `self` - a Map
      `condition` - a 1 or 2 arg Closure that returns a non-null value when processing should stop and a value should be returned
    Returns:
      the first non-null result collected by calling the closure, or null if no such result was found
    Since:
      1.7.5

  - ### findResult

    public static <T, U extends T, V extends T, A, B> T findResult(Map<A,B> self, U defaultResult, Closure<V> condition)
    Returns the first non-null closure result found by passing each map entry to the closure, otherwise the defaultResult is returned. If the closure takes two parameters, the entry key and value are passed. If the closure takes one parameter, the Map.Entry object is passed.

         assert "Found b:3" == [a:1, b:3].findResult("default") { if (it.value == 3) return "Found ${it.key}:${it.value}" }
         assert "default" == [a:1, b:3].findResult("default") { if (it.value == 9) return "Found ${it.key}:${it.value}" }
         assert "Found a:1" == [a:1, b:3].findResult("default") { k, v -> if (k.size() + v == 2) return "Found $k:$v" }

    Parameters:
      `self` - a Map
      `defaultResult` - an Object that should be returned if all closure results are null
      `condition` - a 1 or 2 arg Closure that returns a non-null value when processing should stop and a value should be returned
    Returns:
      the first non-null result collected by calling the closure, or the defaultResult if no such result was found
    Since:
      1.7.5

  - ### findResults

    public static <T, U> Collection<T> findResults(Iterable<U> self, Closure<T> filteringTransform)
    Iterates through the Iterable transforming items using the supplied closure and collecting any non-null results.

    Example:

         def list = [1,2,3]
         def result = list.findResults { it > 1 ? "Found $it" : null }
         assert result == ["Found 2", "Found 3"]

    Parameters:
      `self` - an Iterable
      `filteringTransform` - a Closure that should return either a non-null transformed value or null for items which should be discarded
    Returns:
      the list of non-null transformed values
    Since:
      2.2.0

  - ### findResults

    public static <T> Collection<T> findResults(Iterable<T> self)
    Iterates through the Iterable collecting any non-null results.

    Example:

         assert [1, null, 2, null, 3].findResults() == [1, 2, 3]

    Parameters:
      `self` - an Iterable
    Returns:
      the list of non-null values
    Since:
      4.0.9

  - ### findResults

    public static <T, U> Collection<T> findResults(Iterator<U> self, Closure<T> filteringTransform)
    Iterates through the Iterator transforming items using the supplied closure and collecting any non-null results.
    Parameters:
      `self` - an Iterator
      `filteringTransform` - a Closure that should return either a non-null transformed value or null for items which should be discarded
    Returns:
      the list of non-null transformed values
    Since:
      2.5.0

  - ### findResults

    public static <T> Collection<T> findResults(Iterator<T> self)
    Iterates through the Iterator collecting any non-null results.
    Parameters:
      `self` - an Iterator
    Returns:
      the list of non-null values
    Since:
      4.0.9

  - ### findResults

    public static <T, U> Collection<T> findResults(U[] self, Closure<T> filteringTransform)
    Iterates through the Array transforming items using the supplied closure and collecting any non-null results.
    Parameters:
      `self` - an Array
      `filteringTransform` - a Closure that should return either a non-null transformed value or null for items which should be discarded
    Returns:
      the list of non-null transformed values
    Since:
      2.5.0

  - ### findResults

    public static <T> Collection<T> findResults(T[] self)
    Iterates through the Array collecting any non-null results.
    Parameters:
      `self` - an Array
    Returns:
      the list of non-null values
    Since:
      4.0.9

  - ### findResults

    public static <T, K, V> Collection<T> findResults(Map<K,V> self, Closure<T> filteringTransform)
    Iterates through the map transforming items using the supplied closure and collecting any non-null results. If the closure takes two parameters, the entry key and value are passed. If the closure takes one parameter, the Map.Entry object is passed.

    Example:

         def map = [a:1, b:2, hi:2, cat:3, dog:2]
         def result = map.findResults { k, v -> k.size() == v ? "Found $k:$v" : null }
         assert result == ["Found a:1", "Found hi:2", "Found cat:3"]

    Parameters:
      `self` - a Map
      `filteringTransform` - a 1 or 2 arg Closure that should return either a non-null transformed value or null for items which should be discarded
    Returns:
      the list of non-null transformed values
    Since:
      1.8.1

  - ### find

    public static <K, V> Map.Entry<K,V> find(Map<K,V> self, Closure<?> closure)
    Finds the first entry matching the closure condition. If the closure takes two parameters, the entry key and value are passed. If the closure takes one parameter, the Map.Entry object is passed.

        assert [a:1, b:3].find { it.value == 3 }.key == "b"

    Parameters:
      `self` - a Map
      `closure` - a 1 or 2 arg Closure condition
    Returns:
      the first Object found
    Since:
      1.0

  - ### findAll

    public static <K, V> Map<K,V> findAll(Map<K,V> self, Closure closure)
    Finds all entries matching the closure condition. If the closure takes one parameter then it will be passed the Map.Entry. Otherwise if the closure should take two parameters, which will be the key and the value.

    If the `self` map is one of TreeMap, LinkedHashMap, Hashtable or Properties, the returned Map will preserve that type, otherwise a HashMap will be returned.

    Example usage:

         def result = [a:1, b:2, c:4, d:5].findAll { it.value % 2 == 0 }
         assert result.every { it instanceof Map.Entry }
         assert result*.key == ["b", "c"]
         assert result*.value == [2, 4]

    Parameters:
      `self` - a Map
      `closure` - a 1 or 2 arg Closure condition applying on the entries
    Returns:
      a new subMap
    Since:
      1.0

  - ### findAll

    public static <T> Set<T> findAll(Set<T> self, Closure closure)
    Finds all values matching the closure condition.

        assert ([2,4] as Set) == ([1,2,3,4] as Set).findAll { it % 2 == 0 }

    Parameters:
      `self` - a Set
      `closure` - a closure condition
    Returns:
      a Set of matching values
    Since:
      2.4.0

  - ### findAll

    public static <T> List<T> findAll(List<T> self, Closure closure)
    Finds all values matching the closure condition.

        assert [2,4] == [1,2,3,4].findAll { it % 2 == 0 }

    Parameters:
      `self` - a List
      `closure` - a closure condition
    Returns:
      a List of matching values
    Since:
      2.4.0

  - ### findAll

    public static <T> Collection<T> findAll(Collection<T> self, Closure closure)
    Finds all values matching the closure condition.

        assert [2,4] == [1,2,3,4].findAll { it % 2 == 0 }

    Parameters:
      `self` - a Collection
      `closure` - a closure condition
    Returns:
      a Collection of matching values
    Since:
      1.5.6

  - ### findAll

    public static <T> List<T> findAll(T[] self, Closure condition)
    Finds all elements of the array matching the given Closure condition.

         def items = [1,2,3,4] as Integer[]
         assert [2,4] == items.findAll { it % 2 == 0 }

    Parameters:
      `self` - an array
      `condition` - a closure condition
    Returns:
      a list of matching values
    Since:
      2.0

  - ### findAll$$bridge

    @Deprecated public static <T> Collection<T> findAll$$bridge(T[] self, Closure condition)
    Deprecated.

  - ### findAll

    public static <T> Set<T> findAll(Set<T> self)
    Finds the items matching the IDENTITY Closure (i.e. matching Groovy truth).

    Example:

         def items = [1, 2, 0, false, true, '', 'foo', [], [4, 5], null] as Set
         assert items.findAll() == [1, 2, true, 'foo', [4, 5]] as Set

    Parameters:
      `self` - a Set
    Returns:
      a Set of the truthy values
    Since:
      2.4.0
    See Also:
      - `Closure.IDENTITY`

  - ### findAll

    public static <T> List<T> findAll(List<T> self)
    Finds the items matching the IDENTITY Closure (i.e. matching Groovy truth).

    Example:

         def items = [1, 2, 0, false, true, '', 'foo', [], [4, 5], null]
         assert items.findAll() == [1, 2, true, 'foo', [4, 5]]

    Parameters:
      `self` - a List
    Returns:
      a List of the truthy values
    Since:
      2.4.0
    See Also:
      - `Closure.IDENTITY`

  - ### findAll

    public static <T> Collection<T> findAll(Collection<T> self)
    Finds the items matching the IDENTITY Closure (i.e. matching Groovy truth).

    Example:

         def items = [1, 2, 0, false, true, '', 'foo', [], [4, 5], null]
         assert items.findAll() == [1, 2, true, 'foo', [4, 5]]

    Parameters:
      `self` - a Collection
    Returns:
      a Collection of the truthy values
    Since:
      1.8.1
    See Also:
      - `Closure.IDENTITY`

  - ### findAll

    public static <T> List<T> findAll(T[] self)
    Finds the elements of the array matching the IDENTITY Closure (i.e. matching Groovy truth).

    Example:

         def items = [1, 2, 0, false, true, '', 'foo', [], [4, 5], null] as Object[]
         assert items.findAll() == [1, 2, true, 'foo', [4, 5]]

    Parameters:
      `self` - an array
    Returns:
      a List of the truthy values
    Since:
      2.0
    See Also:
      - `Closure.IDENTITY`

  - ### findAll$$bridge

    @Deprecated public static <T> Collection<T> findAll$$bridge(T[] self)
    Deprecated.

  - ### findAll

    public static List findAll(Object self, Closure closure)
    Finds all items matching the closure condition.
    Parameters:
      `self` - an Object with an Iterator returning its values
      `closure` - a closure condition
    Returns:
      a List of the values found
    Since:
      1.6.0

  - ### findAll$$bridge

    @Deprecated public static Collection findAll$$bridge(Object self, Closure closure)
    Deprecated.

  - ### findAll

    public static List findAll(Object self)
    Finds all items matching the IDENTITY Closure (i.e. matching Groovy truth).

    Example:

         def items = [1, 2, 0, false, true, '', 'foo', [], [4, 5], null]
         assert items.findAll() == [1, 2, true, 'foo', [4, 5]]

    Parameters:
      `self` - an Object with an Iterator returning its values
    Returns:
      a List of the truthy values
    Since:
      1.8.1
    See Also:
      - `Closure.IDENTITY`

  - ### findAll$$bridge

    @Deprecated public static Collection findAll$$bridge(Object self)
    Deprecated.

  - ### contains

    public static boolean contains(Iterable self, Object item)
    Returns `true` if this iterable contains the item.
    Parameters:
      `self` - an Iterable to be checked for containment
      `item` - an Object to be checked for containment in this iterable
    Returns:
      `true` if this iterable contains the item
    Since:
      2.4.0
    See Also:
      - `Collection.contains(Object)`

  - ### containsAll

    public static boolean containsAll(Iterable<?> self, Object[] items)
    Returns `true` if this iterable contains all the elements in the specified array.
    Parameters:
      `self` - an Iterable to be checked for containment
      `items` - array to be checked for containment in this iterable
    Returns:
      `true` if this collection contains all the elements in the specified array
    Since:
      2.4.0
    See Also:
      - `Collection.containsAll(Collection)`

  - ### removeAll

    public static boolean removeAll(Collection self, Object[] items)
    Modifies this collection by removing its elements that are contained within the specified object array. See also `findAll` and `grep` when wanting to produce a new list containing items which don't match some criteria while leaving the original collection unchanged.
    Parameters:
      `self` - a Collection to be modified
      `items` - array containing elements to be removed from this collection
    Returns:
      `true` if this collection changed as a result of the call
    Since:
      1.7.2
    See Also:
      - `Collection.removeAll(Collection)`

  - ### retainAll

    public static boolean retainAll(Collection self, Object[] items)
    Modifies this collection so that it retains only its elements that are contained in the specified array. In other words, removes from this collection all of its elements that are not contained in the specified array. See also `grep` and `findAll` when wanting to produce a new list containing items which match some specified items but leaving the original collection unchanged.
    Parameters:
      `self` - a Collection to be modified
      `items` - array containing elements to be retained from this collection
    Returns:
      `true` if this collection changed as a result of the call
    Since:
      1.7.2
    See Also:
      - `Collection.retainAll(Collection)`

  - ### retainAll

    public static <T> boolean retainAll(Collection<T> self, Closure condition)
    Modifies this collection so that it retains only its elements that are matched according to the specified closure condition. In other words, removes from this collection all of its elements that don't match.

        def list = ['a', 'b']
         list.retainAll { it == 'b' }
         assert list == ['b']

    See also `findAll` and `grep` when wanting to produce a new list containing items which match some criteria but leaving the original collection unchanged.
    Parameters:
      `self` - a Collection to be modified
      `condition` - a closure condition
    Returns:
      `true` if this collection changed as a result of the call
    Since:
      1.7.2
    See Also:
      - `Iterator.remove()`

  - ### retainAll

    public static <K, V> boolean retainAll(Map<K,V> self, Closure condition)
    Modifies this map so that it retains only its elements that are matched according to the specified closure condition. In other words, removes from this map all of its elements that don't match. If the closure takes one parameter then it will be passed the `Map.Entry`. Otherwise the closure should take two parameters, which will be the key and the value.

        def map = [a:1, b:2]
         map.retainAll { k,v -> k == 'b' }
         assert map == [b:2]

    See also `findAll` when wanting to produce a new map containing items which match some criteria but leaving the original map unchanged.
    Parameters:
      `self` - a Map to be modified
      `condition` - a 1 or 2 arg Closure condition applying on the entries
    Returns:
      `true` if this map changed as a result of the call
    Since:
      2.5.0

  - ### removeAll

    public static <T> boolean removeAll(Collection<T> self, Closure condition)
    Modifies this collection by removing the elements that are matched according to the specified closure condition.

        def list = ['a', 'b']
         list.removeAll { it == 'b' }
         assert list == ['a']

    See also `findAll` and `grep` when wanting to produce a new list containing items which match some criteria but leaving the original collection unchanged.
    Parameters:
      `self` - a Collection to be modified
      `condition` - a closure condition
    Returns:
      `true` if this collection changed as a result of the call
    Since:
      1.7.2
    See Also:
      - `Iterator.remove()`

  - ### removeAll

    public static <K, V> boolean removeAll(Map<K,V> self, Closure condition)
    Modifies this map by removing the elements that are matched according to the specified closure condition. If the closure takes one parameter then it will be passed the `Map.Entry`. Otherwise the closure should take two parameters, which will be the key and the value.

        def map = [a:1, b:2]
         map.removeAll { k,v -> k == 'b' }
         assert map == [a:1]

    See also `findAll` when wanting to produce a new map containing items which match some criteria but leaving the original map unchanged.
    Parameters:
      `self` - a Map to be modified
      `condition` - a 1 or 2 arg Closure condition applying on the entries
    Returns:
      `true` if this map changed as a result of the call
    Since:
      2.5.0

  - ### addAll

    public static <T> boolean addAll(Collection<T> self, T[] items)
    Modifies the collection by adding all the elements in the specified array to the collection. The behavior of this operation is undefined if the specified array is modified while the operation is in progress. See also `plus` or the '+' operator if wanting to produce a new collection containing additional items but while leaving the original collection unchanged.
    Parameters:
      `self` - a Collection to be modified
      `items` - array containing elements to be added to this collection
    Returns:
      `true` if this collection changed as a result of the call
    Since:
      1.7.2
    See Also:
      - `Collection.addAll(Collection)`

  - ### addAll

    public static <T> boolean addAll(List<T> self, int index, T[] items)
    Modifies this list by inserting all the elements in the specified array into the list at the specified position. Shifts the element currently at that position (if any) and any subsequent elements to the right (increases their indices). The new elements will appear in this list in the order that they occur in the array. The behavior of this operation is undefined if the specified array is modified while the operation is in progress. See also `plus` for similar functionality with copy semantics, i.e. which produces a new list after adding the additional items at the specified position but leaves the original list unchanged.
    Parameters:
      `self` - a list to be modified
      `items` - array containing elements to be added to this collection
      `index` - index at which to insert the first element from the specified array
    Returns:
      `true` if this collection changed as a result of the call
    Since:
      1.7.2
    See Also:
      - `List.addAll(int, Collection)`

  - ### split

    public static Collection split(Object self, Closure closure)
    Splits all items into two lists based on the closure condition. The first list contains all items matching the closure expression. The second list all those that don't.
    Parameters:
      `self` - an Object with an Iterator returning its values
      `closure` - a closure condition
    Returns:
      a List whose first item is the accepted values and whose second item is the rejected values
    Since:
      1.6.0

  - ### split

    public static <T> Collection<Collection<T>> split(Collection<T> self, Closure closure)
    Splits all items into two collections based on the closure condition. The first list contains all items which match the closure expression. The second list all those that don't.

    Example usage:

        assert [[2,4],[1,3]] == [1,2,3,4].split { it % 2 == 0 }

    Parameters:
      `self` - a Collection of values
      `closure` - a closure condition
    Returns:
      a List whose first item is the accepted values and whose second item is the rejected values
    Since:
      1.6.0

  - ### split

    public static <T> Collection<Collection<T>> split(T[] self, Closure closure)
    Splits all items into two collections based on the closure condition. The first list contains all items which match the closure expression. The second list all those that don't.
    Parameters:
      `self` - an Array
      `closure` - a closure condition
    Returns:
      a List whose first item is the accepted values and whose second item is the rejected values
    Since:
      2.5.0

  - ### split

    public static <T> List<List<T>> split(List<T> self, Closure closure)
    Splits all items into two collections based on the closure condition. The first list contains all items which match the closure expression. The second list all those that don't.

    Example usage:

        assert [[2,4],[1,3]] == [1,2,3,4].split { it % 2 == 0 }

    Parameters:
      `self` - a List of values
      `closure` - a closure condition
    Returns:
      a List whose first item is the accepted values and whose second item is the rejected values
    Since:
      2.4.0

  - ### split

    public static <T> List<Set<T>> split(Set<T> self, Closure closure)
    Splits all items into two collections based on the closure condition. The first list contains all items which match the closure expression. The second list all those that don't.

    Example usage:

        assert [[2,4] as Set, [1,3] as Set] == ([1,2,3,4] as Set).split { it % 2 == 0 }

    Parameters:
      `self` - a Set of values
      `closure` - a closure condition
    Returns:
      a List whose first item is the accepted values and whose second item is the rejected values
    Since:
      2.4.0

  - ### combinations

    public static List combinations(Iterable self)
    Adds GroovyCollections#combinations(Iterable) as a method on Iterables.

    Example usage:

         assert [['a', 'b'],[1, 2, 3]].combinations() == [['a', 1], ['b', 1], ['a', 2], ['b', 2], ['a', 3], ['b', 3]]

    Parameters:
      `self` - an Iterable of collections
    Returns:
      a List of the combinations found
    Since:
      2.2.0
    See Also:
      - `GroovyCollections.combinations(java.lang.Iterable)`

  - ### combinations

    public static List combinations(Iterable self, Closure<?> function)
    Adds GroovyCollections#combinations(Iterable, Closure) as a method on collections.

    Example usage:

        assert [[2, 3],[4, 5, 6]].combinations {x,y -> x*y } == [8, 12, 10, 15, 12, 18]

    Parameters:
      `self` - a Collection of lists
      `function` - a closure to be called on each combination
    Returns:
      a List of the results of applying the closure to each combination found
    Since:
      2.2.0
    See Also:
      - `GroovyCollections.combinations(Iterable)`

  - ### eachCombination

    public static void eachCombination(Iterable self, Closure<?> function)
    Applies a function on each combination of the input lists.

    Example usage:

        [[2, 3],[4, 5, 6]].eachCombination { println "Found $it" }

    Parameters:
      `self` - a Collection of lists
      `function` - a closure to be called on each combination
    Since:
      2.2.0
    See Also:
      - `GroovyCollections.combinations(Iterable)`

  - ### subsequences

    public static <T> Set<List<T>> subsequences(List<T> self)
    Finds all non-null subsequences of a list.

    Example usage:

        def result = [1, 2, 3].subsequences()
         assert result == [[1, 2, 3], [1, 3], [2, 3], [1, 2], [1], [2], [3]] as Set

    Parameters:
      `self` - the List of items
    Returns:
      the subsequences from the list
    Since:
      1.7.0

  - ### permutations

    public static <T> Set<List<T>> permutations(Iterable<T> self)
    Finds all permutations of an iterable.

    Example usage:

        def result = [1, 2, 3].permutations()
         assert result == [[3, 2, 1], [3, 1, 2], [1, 3, 2], [2, 3, 1], [2, 1, 3], [1, 2, 3]] as Set

    Parameters:
      `self` - the Iterable of items
    Returns:
      the permutations from the list
    Since:
      1.7.0

  - ### permutations

    public static <T, V> List<V> permutations(Iterable<T> self, Closure<V> function)
    Finds all permutations of an iterable, applies a function to each permutation and collects the result into a list.

    Example usage:

        Set result = [1, 2, 3].permutations { it.collect { v -> 2*v }}
         assert result == [[6, 4, 2], [6, 2, 4], [2, 6, 4], [4, 6, 2], [4, 2, 6], [2, 4, 6]] as Set

    Parameters:
      `self` - the Iterable of items
      `function` - the function to apply on each permutation
    Returns:
      the list of results of the application of the function on each permutation
    Since:
      2.2.0

  - ### eachPermutation

    public static <T> Iterator<List<T>> eachPermutation(Iterable<T> self, Closure closure)
    Iterates over all permutations of a collection, running a closure for each iteration.

    Example usage:

        def permutations = []
         [1, 2, 3].eachPermutation{ permutations << it }
         assert permutations == [[1, 2, 3], [1, 3, 2], [2, 1, 3], [2, 3, 1], [3, 1, 2], [3, 2, 1]]

    Parameters:
      `self` - the Collection of items
      `closure` - the closure to call for each permutation
    Returns:
      the permutations from the list
    Since:
      1.7.0

  - ### transpose

    public static List transpose(List self)
    Adds GroovyCollections#transpose(List) as a method on lists. A Transpose Function takes a collection of columns and returns a collection of rows. The first row consists of the first element from each column. Successive rows are constructed similarly.

    Example usage:

         def result = [['a', 'b'], [1, 2]].transpose()
         assert result == [['a', 1], ['b', 2]]

         def result = [['a', 'b'], [1, 2], [3, 4]].transpose()
         assert result == [['a', 1, 3], ['b', 2, 4]]

    Parameters:
      `self` - a List of lists
    Returns:
      a List of the transposed lists
    Since:
      1.5.0
    See Also:
      - `GroovyCollections.transpose(java.util.List)`

  - ### transpose

    public static int[][] transpose(int[][] self)
    A transpose method for 2D int arrays.

    Example usage:

         int[][] nums = [[10, 15, 20], [30, 35, 40]]
         int[][] expected = [[10, 30], [15, 35], [20, 40]]
         assert nums.transpose() == expected

    Parameters:
      `self` - a 2D int array
    Returns:
      the transposed 2D int array
    Since:
      3.0.8

  - ### transpose

    public static long[][] transpose(long[][] self)
    A transpose method for 2D long arrays.
    Parameters:
      `self` - a 2D long array
    Returns:
      the transposed 2D long array
    Since:
      3.0.8

  - ### transpose

    public static double[][] transpose(double[][] self)
    A transpose method for 2D double arrays.
    Parameters:
      `self` - a 2D double array
    Returns:
      the transposed 2D double array
    Since:
      3.0.8

  - ### groupBy

    public static <K, T> Map<K,List<T>> groupBy(Iterable<T> self, Closure<K> closure)
    Sorts all Iterable members into groups determined by the supplied mapping closure. The closure should return the key that this item should be grouped by. The returned LinkedHashMap will have an entry for each distinct key returned from the closure, with each value being a list of items for that group.

    Example usage:

         assert [0:[2,4,6], 1:[1,3,5]] == [1,2,3,4,5,6].groupBy { it % 2 }

    Parameters:
      `self` - a collection to group
      `closure` - a closure mapping entries on keys
    Returns:
      a new Map grouped by keys
    Since:
      2.2.0

  - ### groupBy

    public static <K, T> Map<K,List<T>> groupBy(T[] self, Closure<K> closure)
    Sorts all array members into groups determined by the supplied mapping closure. The closure should return the key that this item should be grouped by. The returned LinkedHashMap will have an entry for each distinct key returned from the closure, with each value being a list of items for that group.

    Example usage:

         Integer[] items = [1,2,3,4,5,6]
         assert [0:[2,4,6], 1:[1,3,5]] == items.groupBy { it % 2 }

    Parameters:
      `self` - an array to group
      `closure` - a closure mapping entries on keys
    Returns:
      a new Map grouped by keys
    Since:
      2.2.0
    See Also:
      - `groupBy(Iterable, Closure)`

  - ### groupBy

    public static Map groupBy(Iterable self, Object... closures)
    Sorts all Iterable members into (sub)groups determined by the supplied mapping closures. Each closure should return the key that this item should be grouped by. The returned LinkedHashMap will have an entry for each distinct 'key path' returned from the closures, with each value being a list of items for that 'group path'. Example usage:

        def result = [1,2,3,4,5,6].groupBy({ it % 2 }, { it < 4 })
         assert result == [1:[(true):[1, 3], (false):[5]], 0:[(true):[2], (false):[4, 6]]]

    Another example:

        def sql = groovy.sql.Sql.newInstance(/* ... */)
         def data = sql.rows("SELECT * FROM a_table").groupBy({ it.column1 }, { it.column2 }, { it.column3 })
         if (data.val1.val2.val3) {
             // there exists a record where:
             //   a_table.column1 == val1
             //   a_table.column2 == val2, and
             //   a_table.column3 == val3
         } else {
             // there is no such record
         }

    If an empty array of closures is supplied the IDENTITY Closure will be used.
    Parameters:
      `self` - a collection to group
      `closures` - an array of closures, each mapping entries on keys
    Returns:
      a new Map grouped by keys on each criterion
    Since:
      2.2.0
    See Also:
      - `Closure.IDENTITY`

  - ### groupBy

    public static Map groupBy(Object[] self, Object... closures)
    Sorts all array members into (sub)groups determined by the supplied mapping closures as per the Iterable variant of this method.
    Parameters:
      `self` - an array to group
      `closures` - an array of closures, each mapping entries on keys
    Returns:
      a new Map grouped by keys on each criterion
    Since:
      2.2.0
    See Also:
      - `groupBy(Iterable, Object...)`
      - `Closure.IDENTITY`

  - ### groupBy

    public static Map groupBy(Iterable self, List<Closure> closures)
    Sorts all Iterable members into (sub)groups determined by the supplied mapping closures. Each closure should return the key that this item should be grouped by. The returned LinkedHashMap will have an entry for each distinct 'key path' returned from the closures, with each value being a list of items for that 'group path'. Example usage:

         def result = [1,2,3,4,5,6].groupBy([{ it % 2 }, { it < 4 }])
         assert result == [1:[(true):[1, 3], (false):[5]], 0:[(true):[2], (false):[4, 6]]]

    Another example:

         def sql = groovy.sql.Sql.newInstance(/* ... */)
         def data = sql.rows("SELECT * FROM a_table").groupBy([{ it.column1 }, { it.column2 }, { it.column3 }])
         if (data.val1.val2.val3) {
             // there exists a record where:
             //   a_table.column1 == val1
             //   a_table.column2 == val2, and
             //   a_table.column3 == val3
         } else {
             // there is no such record
         }

    If an empty list of closures is supplied the IDENTITY Closure will be used.
    Parameters:
      `self` - a collection to group
      `closures` - a list of closures, each mapping entries on keys
    Returns:
      a new Map grouped by keys on each criterion
    Since:
      2.2.0
    See Also:
      - `Closure.IDENTITY`

  - ### groupBy

    public static Map groupBy(Object[] self, List<Closure> closures)
    Sorts all array members into (sub)groups determined by the supplied mapping closures as per the list variant of this method.
    Parameters:
      `self` - an array to group
      `closures` - a list of closures, each mapping entries on keys
    Returns:
      a new Map grouped by keys on each criterion
    Since:
      2.2.0
    See Also:
      - `Closure.IDENTITY`
      - `groupBy(Iterable, List)`

  - ### countBy

    public static <K, E> Map<K,Integer> countBy(Iterable<E> self, Closure<K> closure)
    Sorts all collection members into groups determined by the supplied mapping closure and counts the group size. The closure should return the key that each item should be grouped by. The returned Map will have an entry for each distinct key returned from the closure, with each value being the frequency of items occurring for that group.

    Example usage:

        assert [0:2, 1:3] == [1,2,3,4,5].countBy { it % 2 }

    Parameters:
      `self` - a collection to group and count
      `closure` - a closure mapping items to the frequency keys
    Returns:
      a new Map grouped by keys with frequency counts
    Since:
      2.2.0

  - ### countBy

    public static <K, E> Map<K,Integer> countBy(E[] self, Closure<K> closure)
    Sorts all array members into groups determined by the supplied mapping closure and counts the group size. The closure should return the key that each item should be grouped by. The returned Map will have an entry for each distinct key returned from the closure, with each value being the frequency of items occurring for that group.

    Example usage:

        assert ([1,2,2,2,3] as Object[]).countBy{ it % 2 } == [1:2, 0:3]

    Parameters:
      `self` - an array to group and count
      `closure` - a closure mapping items to the frequency keys
    Returns:
      a new Map grouped by keys with frequency counts
    Since:
      1.8.0
    See Also:
      - `countBy(Iterator, Closure)`

  - ### countBy

    public static <K, E> Map<K,Integer> countBy(Iterator<E> self, Closure<K> closure)
    Sorts all iterator items into groups determined by the supplied mapping closure and counts the group size. The closure should return the key that each item should be grouped by. The returned Map will have an entry for each distinct key returned from the closure, with each value being the frequency of items occurring for that group.

    Example usage:

        assert [1,2,2,2,3].toSet().iterator().countBy{ it % 2 } == [1:2, 0:1]

    Parameters:
      `self` - an iterator to group and count
      `closure` - a closure mapping items to the frequency keys
    Returns:
      a new Map grouped by keys with frequency counts
    Since:
      1.8.0

  - ### groupEntriesBy

    public static <G, K, V> Map<G,List<Map.Entry<K,V>>> groupEntriesBy(Map<K,V> self, Closure<G> closure)
    Groups all map entries into groups determined by the supplied mapping closure. The closure will be passed a Map.Entry or key and value (depending on the number of parameters the closure accepts) and should return the key that each item should be grouped under. The resulting map will have an entry for each 'group' key returned by the closure, with values being the list of map entries that belong to each group. (If instead of a list of map entries, you want an actual map use {code}groupBy{code}.)

        def result = [a:1,b:2,c:3,d:4,e:5,f:6].groupEntriesBy { it.value % 2 }
         assert result[0]*.key == ["b", "d", "f"]
         assert result[1]*.value == [1, 3, 5]

    Parameters:
      `self` - a map to group
      `closure` - a 1 or 2 arg Closure mapping entries on keys
    Returns:
      a new Map grouped by keys
    Since:
      1.5.2

  - ### groupBy

    public static <G, K, V> Map<G,Map<K,V>> groupBy(Map<K,V> self, Closure<G> closure)
    Groups the members of a map into sub maps determined by the supplied mapping closure. The closure will be passed a Map.Entry or key and value (depending on the number of parameters the closure accepts) and should return the key that each item should be grouped under. The resulting map will have an entry for each 'group' key returned by the closure, with values being the map members from the original map that belong to each group. (If instead of a map, you want a list of map entries use {code}groupEntriesBy{code}.)

    If the `self` map is one of TreeMap, Hashtable or Properties, the returned Map will preserve that type, otherwise a LinkedHashMap will be returned.

        def result = [a:1,b:2,c:3,d:4,e:5,f:6].groupBy { it.value % 2 }
         assert result == [0:[b:2, d:4, f:6], 1:[a:1, c:3, e:5]]

    Parameters:
      `self` - a map to group
      `closure` - a closure mapping entries on keys
    Returns:
      a new Map grouped by keys
    Since:
      1.0

  - ### groupBy

    public static Map<Object,Map> groupBy(Map self, Object... closures)
    Groups the members of a map into sub maps determined by the supplied mapping closures. Each closure will be passed a Map.Entry or key and value (depending on the number of parameters the closure accepts) and should return the key that each item should be grouped under. The resulting map will have an entry for each 'group path' returned by all closures, with values being the map members from the original map that belong to each such 'group path'. If the `self` map is one of TreeMap, Hashtable, or Properties, the returned Map will preserve that type, otherwise a LinkedHashMap will be returned.

        def result = [a:1,b:2,c:3,d:4,e:5,f:6].groupBy({ it.value % 2 }, { it.key.next() })
         assert result == [1:[b:[a:1], d:[c:3], f:[e:5]], 0:[c:[b:2], e:[d:4], g:[f:6]]]

    If an empty array of closures is supplied the IDENTITY Closure will be used.
    Parameters:
      `self` - a map to group
      `closures` - an array of closures that map entries on keys
    Returns:
      a new map grouped by keys on each criterion
    Since:
      1.8.1
    See Also:
      - `Closure.IDENTITY`

  - ### groupBy

    public static Map<Object,Map> groupBy(Map self, List<Closure> closures)
    Groups the members of a map into sub maps determined by the supplied mapping closures. Each closure will be passed a Map.Entry or key and value (depending on the number of parameters the closure accepts) and should return the key that each item should be grouped under. The resulting map will have an entry for each 'group path' returned by all closures, with values being the map members from the original map that belong to each such 'group path'. If the `self` map is one of TreeMap, Hashtable, or Properties, the returned Map will preserve that type, otherwise a LinkedHashMap will be returned.

        def result = [a:1,b:2,c:3,d:4,e:5,f:6].groupBy([{ it.value % 2 }, { it.key.next() }])
         assert result == [1:[b:[a:1], d:[c:3], f:[e:5]], 0:[c:[b:2], e:[d:4], g:[f:6]]]

    If an empty list of closures is supplied the IDENTITY Closure will be used.
    Parameters:
      `self` - a map to group
      `closures` - a list of closures that map entries on keys
    Returns:
      a new map grouped by keys on each criterion
    Since:
      1.8.1
    See Also:
      - `Closure.IDENTITY`

  - ### countBy

    public static <K, U, V> Map<K,Integer> countBy(Map<U,V> self, Closure<K> closure)
    Groups the members of a map into groups determined by the supplied mapping closure and counts the frequency of the created groups. The closure will be passed a Map.Entry or key and value (depending on the number of parameters the closure accepts) and should return the key that each item should be grouped under. The resulting map will have an entry for each 'group' key returned by the closure, with values being the frequency counts for that 'group'.

        def result = [a:1,b:2,c:3,d:4,e:5].countBy { it.value % 2 }
         assert result == [0:2, 1:3]

    Parameters:
      `self` - a map to group and count
      `closure` - a closure mapping entries to frequency count keys
    Returns:
      a new Map grouped by keys with frequency counts
    Since:
      1.8.0

  - ### groupAnswer

    protected static <K, T> void groupAnswer(Map<K,List<T>> answer, T element, K value)
    Groups the current element according to the value
    Parameters:
      `answer` - the map containing the results
      `element` - the element to be placed
      `value` - the value according to which the element will be placed
    Since:
      1.5.0

  - ### callClosureForMapEntry

    protected static <T, K, V> T callClosureForMapEntry(Closure<T> closure, Map.Entry<K,V> entry)

  - ### callClosureForLine

    protected static <T> T callClosureForLine(Closure<T> closure, String line, int counter)

  - ### callClosureForMapEntryAndCounter

    protected static <T, K, V> T callClosureForMapEntryAndCounter(Closure<T> closure, Map.Entry<K,V> entry, int counter)

  - ### inject

    public static <T, V extends T> T inject(Collection<T> self, Closure<V> closure)
    Performs the same function as the version of inject that takes an initial value, but uses the head of the Collection as the initial value, and iterates over the tail.

         assert 1 * 2 * 3 * 4 == [ 1, 2, 3, 4 ].inject { acc, val -> acc * val }
         assert ['b'] == [['a','b'], ['b','c'], ['d','b']].inject { acc, val -> acc.intersect( val ) }
         LinkedHashSet set = [ 't', 'i', 'm' ]
         assert 'tim' == set.inject { a, b -> a + b }

    Parameters:
      `self` - a Collection
      `closure` - a closure
    Returns:
      the result of the last closure call
    Throws:
      `NoSuchElementException` - if the collection is empty.
    Since:
      1.8.7
    See Also:
      - `inject(Collection, Object, Closure)`

  - ### inject

    public static <E, T, U extends T, V extends T> T inject(Collection<E> self, U initialValue, Closure<V> closure)
    Iterates through the given Collection, passing in the initial value to the 2-arg closure along with the first item. The result is passed back (injected) into the closure along with the second item. The new result is injected back into the closure along with the third item and so on until the entire collection has been used. Also known as `foldLeft` or `reduce` in functional parlance. Examples:

         assert 1*1*2*3*4 == [1,2,3,4].inject(1) { acc, val -> acc * val }

         assert 0+1+2+3+4 == [1,2,3,4].inject(0) { acc, val -> acc + val }

         assert 'The quick brown fox' ==
             ['quick', 'brown', 'fox'].inject('The') { acc, val -> acc + ' ' + val }

         assert 'bat' ==
             ['rat', 'bat', 'cat'].inject('zzz') { min, next -> next < min ? next : min }

         def max = { a, b -> [a, b].max() }
         def animals = ['bat', 'rat', 'cat']
         assert 'rat' == animals.inject('aaa', max)

    Visual representation of the last example above:

            initVal  animals[0]
               v        v
         max('aaa',   'bat')  =>  'bat'  animals[1]
                                    v       v
                              max('bat',  'rat')  =>  'rat'  animals[2]
                                                        v       v
                                                  max('rat',  'cat')  =>  'rat'

    Parameters:
      `self` - a Collection
      `initialValue` - some initial value
      `closure` - a closure
    Returns:
      the result of the last closure call
    Since:
      1.0

  - ### inject

    public static <K, V, T, U extends T, W extends T> T inject(Map<K,V> self, U initialValue, Closure<W> closure)
    Iterates through the given Map, passing in the initial value to the 2-arg Closure along with the first item (or 3-arg Closure along with the first key and value). The result is passed back (injected) into the closure along with the second item. The new result is injected back into the closure along with the third item and so on until the entire collection has been used. Also known as `foldLeft` or `reduce` in functional parlance. Examples:

         def map = [a:1, b:2, c:3]
         assert map.inject([]) { list, k, v ->
           list + [k] * v
         } == ['a', 'b', 'b', 'c', 'c', 'c']

    Parameters:
      `self` - a Map
      `initialValue` - some initial value
      `closure` - a 2 or 3 arg Closure
    Returns:
      the result of the last closure call
    Since:
      1.8.1

  - ### inject

    public static <E, T, U extends T, V extends T> T inject(Iterator<E> self, U initialValue, Closure<V> closure)
    Iterates through the given Iterator, passing in the initial value to the closure along with the first item. The result is passed back (injected) into the closure along with the second item. The new result is injected back into the closure along with the third item and so on until the Iterator has been expired of values. Also known as foldLeft in functional parlance.
    Parameters:
      `self` - an Iterator
      `initialValue` - some initial value
      `closure` - a closure
    Returns:
      the result of the last closure call
    Since:
      1.5.0
    See Also:
      - `inject(Collection, Object, Closure)`

  - ### inject

    public static <T, V extends T> T inject(Object self, Closure<V> closure)
    Iterates through the given Object, passing in the first value to the closure along with the first item. The result is passed back (injected) into the closure along with the second item. The new result is injected back into the closure along with the third item and so on until further iteration of the object is not possible. Also known as foldLeft in functional parlance.
    Parameters:
      `self` - an Object
      `closure` - a closure
    Returns:
      the result of the last closure call
    Throws:
      `NoSuchElementException` - if the collection is empty.
    Since:
      1.8.7
    See Also:
      - `inject(Collection, Object, Closure)`

  - ### inject

    public static <T, U extends T, V extends T> T inject(Object self, U initialValue, Closure<V> closure)
    Iterates through the given Object, passing in the initial value to the closure along with the first item. The result is passed back (injected) into the closure along with the second item. The new result is injected back into the closure along with the third item and so on until further iteration of the object is not possible. Also known as foldLeft in functional parlance.
    Parameters:
      `self` - an Object
      `initialValue` - some initial value
      `closure` - a closure
    Returns:
      the result of the last closure call
    Since:
      1.5.0
    See Also:
      - `inject(Collection, Object, Closure)`

  - ### inject

    public static <E, T, V extends T> T inject(E[] self, Closure<V> closure)
    Iterates through the given array as with inject(Object[],initialValue,closure), but using the first element of the array as the initialValue, and then iterating the remaining elements of the array.
    Parameters:
      `self` - an Object[]
      `closure` - a closure
    Returns:
      the result of the last closure call
    Throws:
      `NoSuchElementException` - if the array is empty.
    Since:
      1.8.7
    See Also:
      - `inject(Object[], Object, Closure)`

  - ### inject

    public static <E, T, U extends T, V extends T> T inject(E[] self, U initialValue, Closure<V> closure)
    Iterates through the given array, passing in the initial value to the closure along with the first item. The result is passed back (injected) into the closure along with the second item. The new result is injected back into the closure along with the third item and so on until all elements of the array have been used. Also known as foldLeft in functional parlance.
    Parameters:
      `self` - an Object[]
      `initialValue` - some initial value
      `closure` - a closure
    Returns:
      the result of the last closure call
    Since:
      1.5.0
    See Also:
      - `inject(Collection, Object, Closure)`

  - ### sum

    public static Object sum(Iterable<?> self)
    Sums the items in an Iterable. This is equivalent to invoking the "plus" method on all items in the Iterable.

        assert 1+2+3+4 == [1,2,3,4].sum()

    Parameters:
      `self` - Iterable of values to add together
    Returns:
      The sum of all the items
    Since:
      2.2.0
    See Also:
      - `sum(Iterator)`

  - ### sum

    public static Object sum(Object[] self)
    Sums the items in an array. This is equivalent to invoking the "plus" method on all items in the array.
    Parameters:
      `self` - The array of values to add together
    Returns:
      The sum of all the items
    Since:
      1.7.1
    See Also:
      - `sum(java.util.Iterator)`

  - ### sum

    public static Object sum(Iterator<Object> self)
    Sums the items from an Iterator. This is equivalent to invoking the "plus" method on all items from the Iterator. The iterator will become exhausted of elements after determining the sum value.
    Parameters:
      `self` - an Iterator for the values to add together
    Returns:
      The sum of all the items
    Since:
      1.5.5

  - ### sum

    public static byte sum(byte[] self)
    Sums the items in an array.

        assert (1+2+3+4 as byte) == ([1,2,3,4] as byte[]).sum()

    Parameters:
      `self` - The array of values to add together
    Returns:
      The sum of all the items
    Since:
      2.4.2

  - ### sum

    public static short sum(short[] self)
    Sums the items in an array.

        assert (1+2+3+4 as short) == ([1,2,3,4] as short[]).sum()

    Parameters:
      `self` - The array of values to add together
    Returns:
      The sum of all the items
    Since:
      2.4.2

  - ### sum

    public static int sum(int[] self)
    Sums the items in an array.

        assert 1+2+3+4 == ([1,2,3,4] as int[]).sum()

    Parameters:
      `self` - The array of values to add together
    Returns:
      The sum of all the items
    Since:
      2.4.2

  - ### sum

    public static long sum(long[] self)
    Sums the items in an array.

        assert (1+2+3+4 as long) == ([1,2,3,4] as long[]).sum()

    Parameters:
      `self` - The array of values to add together
    Returns:
      The sum of all the items
    Since:
      2.4.2

  - ### sum

    public static char sum(char[] self)
    Sums the items in an array.

        assert (1+2+3+4 as char) == ([1,2,3,4] as char[]).sum()

    Parameters:
      `self` - The array of values to add together
    Returns:
      The sum of all the items
    Since:
      2.4.2

  - ### sum

    public static float sum(float[] self)
    Sums the items in an array.

        assert (1+2+3+4 as float) == ([1,2,3,4] as float[]).sum()

    Parameters:
      `self` - The array of values to add together
    Returns:
      The sum of all the items
    Since:
      2.4.2

  - ### sum

    public static double sum(double[] self)
    Sums the items in an array.

        assert (1+2+3+4 as double) == ([1,2,3,4] as double[]).sum()

    Parameters:
      `self` - The array of values to add together
    Returns:
      The sum of all the items
    Since:
      2.4.2

  - ### sum

    public static Object sum(Iterable<?> self, Object initialValue)
    Sums the items in an Iterable, adding the result to some initial value.

         assert 5+1+2+3+4 == [1,2,3,4].sum(5)

    Parameters:
      `self` - an Iterable of values to sum
      `initialValue` - the items in the collection will be summed to this initial value
    Returns:
      The sum of all the items.
    Since:
      2.2.0
    See Also:
      - `sum(Iterator, Object)`

  - ### sum

    public static Object sum(Object[] self, Object initialValue)
    Sums the items in an array, adding the result to some initial value.
    Parameters:
      `self` - an array of values to sum
      `initialValue` - the items in the array will be summed to this initial value
    Returns:
      The sum of all the items.
    Since:
      1.7.1

  - ### sum

    public static Object sum(Iterator<?> self, Object initialValue)
    Sums the items from an Iterator, adding the result to some initial value. This is equivalent to invoking the "plus" method on all items from the Iterator. The iterator will become exhausted of elements after determining the sum value.
    Parameters:
      `self` - an Iterator for the values to add together
      `initialValue` - the items in the collection will be summed to this initial value
    Returns:
      The sum of all the items
    Since:
      1.5.5

  - ### sum

    public static byte sum(byte[] self, byte initialValue)
    Sums the items in an array, adding the result to some initial value.

        assert (5+1+2+3+4 as byte) == ([1,2,3,4] as byte[]).sum(5 as byte)

    Parameters:
      `self` - an array of values to sum
      `initialValue` - the items in the array will be summed to this initial value
    Returns:
      The sum of all the items.
    Since:
      2.4.2

  - ### sum

    public static short sum(short[] self, short initialValue)
    Sums the items in an array, adding the result to some initial value.

        assert (5+1+2+3+4 as short) == ([1,2,3,4] as short[]).sum(5 as short)

    Parameters:
      `self` - an array of values to sum
      `initialValue` - the items in the array will be summed to this initial value
    Returns:
      The sum of all the items.
    Since:
      2.4.2

  - ### sum

    public static int sum(int[] self, int initialValue)
    Sums the items in an array, adding the result to some initial value.

        assert 5+1+2+3+4 == ([1,2,3,4] as int[]).sum(5)

    Parameters:
      `self` - an array of values to sum
      `initialValue` - the items in the array will be summed to this initial value
    Returns:
      The sum of all the items.
    Since:
      2.4.2

  - ### sum

    public static long sum(long[] self, long initialValue)
    Sums the items in an array, adding the result to some initial value.

        assert (5+1+2+3+4 as long) == ([1,2,3,4] as long[]).sum(5)

    Parameters:
      `self` - an array of values to sum
      `initialValue` - the items in the array will be summed to this initial value
    Returns:
      The sum of all the items.
    Since:
      2.4.2

  - ### sum

    public static char sum(char[] self, char initialValue)
    Sums the items in an array, adding the result to some initial value.

        assert (5+1+2+3+4 as char) == ([1,2,3,4] as char[]).sum(5 as char)

    Parameters:
      `self` - an array of values to sum
      `initialValue` - the items in the array will be summed to this initial value
    Returns:
      The sum of all the items.
    Since:
      2.4.2

  - ### sum

    public static float sum(float[] self, float initialValue)
    Sums the items in an array, adding the result to some initial value.

        assert (5+1+2+3+4 as float) == ([1,2,3,4] as float[]).sum(5)

    Parameters:
      `self` - an array of values to sum
      `initialValue` - the items in the array will be summed to this initial value
    Returns:
      The sum of all the items.
    Since:
      2.4.2

  - ### sum

    public static double sum(double[] self, double initialValue)
    Sums the items in an array, adding the result to some initial value.

        assert (5+1+2+3+4 as double) == ([1,2,3,4] as double[]).sum(5)

    Parameters:
      `self` - an array of values to sum
      `initialValue` - the items in the array will be summed to this initial value
    Returns:
      The sum of all the items.
    Since:
      2.4.2

  - ### sum

    public static <T> Object sum(Iterable<T> self, Closure closure)
    Sums the result of applying a closure to each item of an Iterable. `coll.sum(closure)` is equivalent to: `coll.collect(closure).sum()`.

        assert 4+6+10+12 == [2,3,5,6].sum { it * 2 }

    Parameters:
      `self` - an Iterable
      `closure` - a single parameter closure that returns a (typically) numeric value.
    Returns:
      The sum of the values returned by applying the closure to each item of the Iterable.
    Since:
      2.2.0

  - ### sum

    public static <T> Object sum(T[] self, Closure closure)
    Sums the result of applying a closure to each item of an array. `array.sum(closure)` is equivalent to: `array.collect(closure).sum()`.
    Parameters:
      `self` - An array
      `closure` - a single parameter closure that returns a (typically) numeric value.
    Returns:
      The sum of the values returned by applying the closure to each item of the array.
    Since:
      1.7.1

  - ### sum

    public static <T> Object sum(Iterator<T> self, Closure closure)
    Sums the result of applying a closure to each item returned from an iterator. `iter.sum(closure)` is equivalent to: `iter.collect(closure).sum()`. The iterator will become exhausted of elements after determining the sum value.
    Parameters:
      `self` - An Iterator
      `closure` - a single parameter closure that returns a (typically) numeric value.
    Returns:
      The sum of the values returned by applying the closure to each item from the Iterator.
    Since:
      1.7.1

  - ### sum

    public static <T> Object sum(Iterable<T> self, Object initialValue, Closure closure)
    Sums the result of applying a closure to each item of an Iterable to some initial value. `iter.sum(initVal, closure)` is equivalent to: `iter.collect(closure).sum(initVal)`.

        assert 50+4+6+10+12 == [2,3,5,6].sum(50) { it * 2 }

    Parameters:
      `self` - an Iterable
      `closure` - a single parameter closure that returns a (typically) numeric value.
      `initialValue` - the closure results will be summed to this initial value
    Returns:
      The sum of the values returned by applying the closure to each item of the collection.
    Since:
      1.5.0

  - ### sum

    public static <T> Object sum(T[] self, Object initialValue, Closure closure)
    Sums the result of applying a closure to each item of an array to some initial value. `array.sum(initVal, closure)` is equivalent to: `array.collect(closure).sum(initVal)`.
    Parameters:
      `self` - an array
      `closure` - a single parameter closure that returns a (typically) numeric value.
      `initialValue` - the closure results will be summed to this initial value
    Returns:
      The sum of the values returned by applying the closure to each item of the array.
    Since:
      1.7.1

  - ### sum

    public static <T> Object sum(Iterator<T> self, Object initialValue, Closure closure)
    Sums the result of applying a closure to each item of an Iterator to some initial value. `iter.sum(initVal, closure)` is equivalent to: `iter.collect(closure).sum(initVal)`. The iterator will become exhausted of elements after determining the sum value.
    Parameters:
      `self` - an Iterator
      `closure` - a single parameter closure that returns a (typically) numeric value.
      `initialValue` - the closure results will be summed to this initial value
    Returns:
      The sum of the values returned by applying the closure to each item from the Iterator.
    Since:
      1.7.1

  - ### average

    public static Object average(Iterable<?> self)
    Averages the items in an Iterable. This is equivalent to invoking the "plus" method on all items in the Iterable and then dividing by the total count using the "div" method for the resulting sum.

         assert 3 == [1, 2, 6].average()

    Parameters:
      `self` - Iterable of values to average
    Returns:
      The average of all the items
    Since:
      3.0.0
    See Also:
      - `average(Iterator)`

  - ### average

    public static Object average(Object[] self)
    Averages the items in an array. This is equivalent to invoking the "plus" method on all items in the array and then dividing by the total count using the "div" method for the resulting sum.

         assert 3 == ([1, 2, 6] as Integer[]).average()

    Parameters:
      `self` - The array of values to average
    Returns:
      The average of all the items
    Since:
      3.0.0
    See Also:
      - `sum(java.lang.Object[])`

  - ### average

    public static Object average(Iterator<?> self)
    Averages the items from an Iterator. This is equivalent to invoking the "plus" method on all items in the array and then dividing by the total count using the "div" method for the resulting sum. The iterator will become exhausted of elements after determining the average value. While most frequently used with aggregates of numbers, `average` will work with any class supporting `plus` and `div`, e.g.:

         class Stars {
             int numStars = 0
             String toString() {
                 '*' * numStars
             }
             Stars plus(Stars other) {
                 new Stars(numStars: numStars + other.numStars)
             }
             Stars div(Number divisor) {
                 int newSize = numStars.intdiv(divisor)
                 new Stars(numStars: newSize)
             }
         }

         def stars = [new Stars(numStars: 1), new Stars(numStars: 3)]
         assert stars*.toString() == ['*', '***']
         assert stars.average().toString() == '**'

    Parameters:
      `self` - an Iterator for the values to average
    Returns:
      The average of all the items
    Since:
      3.0.0

  - ### average

    public static BigDecimal average(byte[] self)
    Calculates the average of the bytes in the array.

        assert 5.0G == ([2,4,6,8] as byte[]).average()

    Parameters:
      `self` - The array of values to calculate the average of
    Returns:
      The average of the items
    Since:
      3.0.0

  - ### average

    public static BigDecimal average(short[] self)
    Calculates the average of the shorts in the array.

        assert 5.0G == ([2,4,6,8] as short[]).average()

    Parameters:
      `self` - The array of values to calculate the average of
    Returns:
      The average of the items
    Since:
      3.0.0

  - ### average

    public static BigDecimal average(int[] self)
    Calculates the average of the ints in the array.

        assert 5.0G == ([2,4,6,8] as int[]).average()

    Parameters:
      `self` - The array of values to calculate the average of
    Returns:
      The average of the items
    Since:
      3.0.0

  - ### average

    public static BigDecimal average(long[] self)
    Calculates the average of the longs in the array.

        assert 5.0G == ([2,4,6,8] as long[]).average()

    Parameters:
      `self` - The array of values to calculate the average of
    Returns:
      The average of the items
    Since:
      3.0.0

  - ### average

    public static double average(float[] self)
    Calculates the average of the floats in the array.

        assert 5.0d == ([2,4,6,8] as float[]).average()

    Parameters:
      `self` - The array of values to calculate the average of
    Returns:
      The average of the items
    Since:
      3.0.0

  - ### average

    public static double average(double[] self)
    Calculates the average of the doubles in the array.

        assert 5.0d == ([2,4,6,8] as double[]).average()

    Parameters:
      `self` - The array of values to calculate the average of
    Returns:
      The average of the items
    Since:
      3.0.0

  - ### average

    public static <T> Object average(Iterable<T> self, Closure closure)
    Averages the result of applying a closure to each item of an Iterable. `iter.average(closure)` is equivalent to: `iter.collect(closure).average()`.

         assert 20 == [1, 3].average { it * 10 }
         assert 3 == ['to', 'from'].average { it.size() }

    Parameters:
      `self` - an Iterable
      `closure` - a single parameter closure that returns a (typically) numeric value.
    Returns:
      The average of the values returned by applying the closure to each item of the Iterable.
    Since:
      3.0.0

  - ### average

    public static <T> Object average(T[] self, Closure closure)
    Averages the result of applying a closure to each item of an array. `array.average(closure)` is equivalent to: `array.collect(closure).average()`.

         def (nums, strings) = [[1, 3] as Integer[], ['to', 'from'] as String[]]
         assert 20 == nums.average { it * 10 }
         assert 3 == strings.average { it.size() }
         assert 3 == strings.average (String::size)

    Parameters:
      `self` - An array
      `closure` - a single parameter closure that returns a (typically) numeric value.
    Returns:
      The average of the values returned by applying the closure to each item of the array.
    Since:
      3.0.0

  - ### average

    public static <T> Object average(Iterator<T> self, Closure closure)
    Averages the result of applying a closure to each item returned from an iterator. `iter.average(closure)` is equivalent to: `iter.collect(closure).average()`. The iterator will become exhausted of elements after determining the average value.
    Parameters:
      `self` - An Iterator
      `closure` - a single parameter closure that returns a (typically) numeric value.
    Returns:
      The average of the values returned by applying the closure to each item from the Iterator.
    Since:
      3.0.0

  - ### join

    public static String join(Iterator<?> self, String separator)
    Concatenates the `toString()` representation of each item from the iterator, with the given String as a separator between each item. The iterator will become exhausted of elements after determining the resulting conjoined value.
    Parameters:
      `self` - an Iterator of items
      `separator` - a String separator
    Returns:
      the joined String
    Since:
      1.5.5

  - ### join

    public static String join(Iterable<?> self, String separator)
    Concatenates the `toString()` representation of each item in this Iterable, with the given String as a separator between each item.

        assert "1, 2, 3" == [1,2,3].join(", ")

    Parameters:
      `self` - an Iterable of objects
      `separator` - a String separator
    Returns:
      the joined String
    Since:
      1.0

  - ### join

    public static <T> String join(T[] self, String separator)
    Concatenates the `toString()` representation of each item in this array, with the given String as a separator between each item.
    Parameters:
      `self` - an array of Object
      `separator` - a String separator
    Returns:
      the joined String
    Since:
      1.0

  - ### join

    public static String join(boolean[] self, String separator)
    Concatenates the string representation of each item in this array, with the given String as a separator between each item.
    Parameters:
      `self` - an array of boolean
      `separator` - a String separator
    Returns:
      the joined String
    Since:
      2.4.1

  - ### join

    public static String join(byte[] self, String separator)
    Concatenates the string representation of each item in this array, with the given String as a separator between each item.
    Parameters:
      `self` - an array of byte
      `separator` - a String separator
    Returns:
      the joined String
    Since:
      2.4.1

  - ### join

    public static String join(char[] self, String separator)
    Concatenates the string representation of each item in this array, with the given String as a separator between each item.
    Parameters:
      `self` - an array of char
      `separator` - a String separator
    Returns:
      the joined String
    Since:
      2.4.1

  - ### join

    public static String join(double[] self, String separator)
    Concatenates the string representation of each item in this array, with the given String as a separator between each item.
    Parameters:
      `self` - an array of double
      `separator` - a String separator
    Returns:
      the joined String
    Since:
      2.4.1

  - ### join

    public static String join(float[] self, String separator)
    Concatenates the string representation of each item in this array, with the given String as a separator between each item.
    Parameters:
      `self` - an array of float
      `separator` - a String separator
    Returns:
      the joined String
    Since:
      2.4.1

  - ### join

    public static String join(int[] self, String separator)
    Concatenates the string representation of each item in this array, with the given String as a separator between each item.
    Parameters:
      `self` - an array of int
      `separator` - a String separator
    Returns:
      the joined String
    Since:
      2.4.1

  - ### join

    public static String join(long[] self, String separator)
    Concatenates the string representation of each item in this array, with the given String as a separator between each item.
    Parameters:
      `self` - an array of long
      `separator` - a String separator
    Returns:
      the joined String
    Since:
      2.4.1

  - ### join

    public static String join(short[] self, String separator)
    Concatenates the string representation of each item in this array, with the given String as a separator between each item.
    Parameters:
      `self` - an array of short
      `separator` - a String separator
    Returns:
      the joined String
    Since:
      2.4.1

  - ### min

    public static <T> T min(Iterable<T> self)
    Adds min() method to Collection objects.

        assert 2 == [4,2,5].min()

    Parameters:
      `self` - a Collection
    Returns:
      the minimum value
    Since:
      1.0
    See Also:
      - `min(Iterator)`

  - ### min

    public static <T> T min(Iterator<T> self)
    Adds min() method to Iterator objects. The iterator will become exhausted of elements after determining the minimum value.
    Parameters:
      `self` - an Iterator
    Returns:
      the minimum value
    Since:
      1.5.5
    See Also:
      - `min(Iterable)`

  - ### min

    public static <T> T min(T[] self)
    Adds min() method to Object arrays.
    Parameters:
      `self` - an array
    Returns:
      the minimum value
    Since:
      1.5.5
    See Also:
      - `min(Iterator)`

  - ### min

    public static int min(int[] self)
    Adds min() method to int arrays.

    Example usage:

         int[] nums = [10, 20, 30]
         assert 10 == nums.min()

    Parameters:
      `self` - an int array
    Returns:
      the minimum value
    Since:
      3.0.8
    See Also:
      - `min(Object[])`

  - ### min

    public static long min(long[] self)
    Adds min() method to long arrays.
    Parameters:
      `self` - a long array
    Returns:
      the minimum value
    Since:
      3.0.8
    See Also:
      - `min(Object[])`

  - ### min

    public static double min(double[] self)
    Adds min() method to double arrays.
    Parameters:
      `self` - a double array
    Returns:
      the minimum value
    Since:
      3.0.8
    See Also:
      - `min(Object[])`

  - ### min

    public static <T> T min(Iterable<T> self, Comparator<? super T> comparator)
    Selects the minimum value found in the Iterable using the given comparator.

        assert "hi" == ["hello","hi","hey"].min( { a, b -> a.length() <=> b.length() } as Comparator )

    Parameters:
      `self` - an Iterable
      `comparator` - a Comparator
    Returns:
      the minimum value or null for an empty Iterable
    Since:
      2.2.0
    See Also:
      - `min(Iterator, java.util.Comparator)`

  - ### min

    public static <T> T min(Iterator<T> self, Comparator<? super T> comparator)
    Selects the minimum value found from the Iterator using the given comparator.
    Parameters:
      `self` - an Iterator
      `comparator` - a Comparator
    Returns:
      the minimum value
    Since:
      1.5.5

  - ### min

    public static <T> T min(T[] self, Comparator<? super T> comparator)
    Selects the minimum value found from the Object array using the given comparator.
    Parameters:
      `self` - an array
      `comparator` - a Comparator
    Returns:
      the minimum value
    Since:
      1.5.5
    See Also:
      - `min(Iterator, java.util.Comparator)`

  - ### min

    public static <T> T min(Iterable<T> self, Closure closure)
    Selects the item in the iterable which when passed as a parameter to the supplied closure returns the minimum value. A null return value represents the least possible return value. If more than one item has the minimum value, an arbitrary choice is made between the items having the minimum value.

    If the closure has two parameters it is used like a traditional Comparator. I.e. it should compare its two parameters for order, returning a negative integer, zero, or a positive integer when the first parameter is less than, equal to, or greater than the second respectively. Otherwise, the Closure is assumed to take a single parameter and return a Comparable (typically an Integer) which is then used for further comparison.

         assert "hi" == ["hello","hi","hey"].min { it.length() }

         def lastDigit = { a, b -> a % 10 <=> b % 10 }
         assert [19, 55, 91].min(lastDigit) == 91

         def pets = ['dog', 'cat', 'anaconda']
         def shortestName = pets.min{ it.size() } // one of 'dog' or 'cat'
         assert shortestName.size() == 3

    Parameters:
      `self` - an Iterable
      `closure` - a 1 or 2 arg Closure used to determine the correct ordering
    Returns:
      an item from the Iterable having the minimum value returned by calling the supplied closure with that item as parameter or null for an empty Iterable
    Since:
      1.0
    See Also:
      - `min(Iterator)`

  - ### min

    public static <K, V> Map.Entry<K,V> min(Map<K,V> self, Closure closure)
    Selects an entry in the map having the minimum calculated value as determined by the supplied closure. If more than one entry has the minimum value, an arbitrary choice is made between the entries having the minimum value.

    If the closure has two parameters it is used like a traditional Comparator. I.e. it should compare its two parameters for order, returning a negative integer, zero, or a positive integer when the first parameter is less than, equal to, or greater than the second respectively. Otherwise, the Closure is assumed to take a single parameter and return a Comparable (typically an Integer) which is then used for further comparison.

         def zoo = [monkeys:6, lions:5, tigers:7]
         def leastCommonEntry = zoo.min{ it.value }
         assert leastCommonEntry.value == 5
         def mostCommonEntry = zoo.min{ a, b -> b.value <=> a.value } // double negative!
         assert mostCommonEntry.value == 7

    Edge case for multiple min values:

         def zoo = [monkeys:6, lions:5, tigers:7]
         def lastCharOfName = { e -> e.key[-1] }
         def ans = zoo.min(lastCharOfName) // some random entry
         assert lastCharOfName(ans) == 's'

    Parameters:
      `self` - a Map
      `closure` - a 1 or 2 arg Closure used to determine the correct ordering
    Returns:
      the Map.Entry having the minimum value as determined by the closure
    Since:
      1.7.6

  - ### max

    public static <K, V> Map.Entry<K,V> max(Map<K,V> self, Closure closure)
    Selects an entry in the map having the maximum calculated value as determined by the supplied closure. If more than one entry has the maximum value, an arbitrary choice is made between the entries having the maximum value.

    If the closure has two parameters it is used like a traditional Comparator. I.e. it should compare its two parameters for order, returning a negative integer, zero, or a positive integer when the first parameter is less than, equal to, or greater than the second respectively. Otherwise, the Closure is assumed to take a single parameter and return a Comparable (typically an Integer) which is then used for further comparison. An example:

         def zoo = [monkeys:6, lions:5, tigers:7]
         def mostCommonEntry = zoo.max{ it.value }
         assert mostCommonEntry.value == 7
         def leastCommonEntry = zoo.max{ a, b -> b.value <=> a.value } // double negative!
         assert leastCommonEntry.value == 5

    Edge case for multiple max values:

         def zoo = [monkeys:6, lions:5, tigers:7]
         def lengthOfNamePlusNumber = { e -> e.key.size() + e.value }
         def ans = zoo.max(lengthOfNamePlusNumber) // one of [monkeys:6, tigers:7]
         assert lengthOfNamePlusNumber(ans) == 13

    Parameters:
      `self` - a Map
      `closure` - a 1 or 2 arg Closure used to determine the correct ordering
    Returns:
      the Map.Entry having the maximum value as determined by the closure
    Since:
      1.7.6

  - ### min

    public static <T> T min(Iterator<T> self, Closure closure)
    Selects the minimum value found from the Iterator using the closure to determine the correct ordering. The iterator will become exhausted of elements after this operation.

    If the closure has two parameters it is used like a traditional Comparator. I.e. it should compare its two parameters for order, returning a negative integer, zero, or a positive integer when the first parameter is less than, equal to, or greater than the second respectively. Otherwise, the Closure is assumed to take a single parameter and return a Comparable (typically an Integer) which is then used for further comparison.

    Parameters:
      `self` - an Iterator
      `closure` - a Closure used to determine the correct ordering
    Returns:
      the minimum value
    Since:
      1.5.5

  - ### min

    public static <T> T min(T[] self, Closure closure)
    Selects the minimum value found from the Object array using the closure to determine the correct ordering.

    If the closure has two parameters it is used like a traditional Comparator. I.e. it should compare its two parameters for order, returning a negative integer, zero, or a positive integer when the first parameter is less than, equal to, or greater than the second respectively. Otherwise, the Closure is assumed to take a single parameter and return a Comparable (typically an Integer) which is then used for further comparison.

    Parameters:
      `self` - an array
      `closure` - a Closure used to determine the correct ordering
    Returns:
      the minimum value
    Since:
      1.5.5
    See Also:
      - `min(Iterator, groovy.lang.Closure)`

  - ### max

    public static <T> T max(Iterable<T> self)
    Adds max() method to Iterable objects.

         assert 5 == [2,3,1,5,4].max()

    Parameters:
      `self` - an Iterable
    Returns:
      the maximum value
    Since:
      2.2.0
    See Also:
      - `max(Iterator)`

  - ### max

    public static <T> T max(Iterator<T> self)
    Adds max() method to Iterator objects. The iterator will become exhausted of elements after determining the maximum value.
    Parameters:
      `self` - an Iterator
    Returns:
      the maximum value
    Since:
      1.5.5

  - ### max

    public static <T> T max(T[] self)
    Adds max() method to Object arrays.
    Parameters:
      `self` - an array
    Returns:
      the maximum value
    Since:
      1.5.5
    See Also:
      - `max(Iterator)`

  - ### max

    public static int max(int[] self)
    Adds max() method to int arrays.
    Parameters:
      `self` - an int array
    Returns:
      the maximum value
    Since:
      3.0.8
    See Also:
      - `max(Object[])`

  - ### max

    public static long max(long[] self)
    Adds max() method to long arrays.
    Parameters:
      `self` - a long array
    Returns:
      the maximum value
    Since:
      3.0.8
    See Also:
      - `max(Object[])`

  - ### max

    public static double max(double[] self)
    Adds max() method to double arrays.

    Example usage:

         double[] nums = [1.1d, 2.2d, 3.3d]
         assert 3.3d == nums.max()

    Parameters:
      `self` - a double array
    Returns:
      the maximum value
    Since:
      3.0.8
    See Also:
      - `max(Object[])`

  - ### max

    public static <T> T max(Iterable<T> self, Closure closure)
    Selects the item in the iterable which when passed as a parameter to the supplied closure returns the maximum value. A null return value represents the least possible return value, so any item for which the supplied closure returns null, won't be selected (unless all items return null). If more than one item has the maximum value, an arbitrary choice is made between the items having the maximum value.

    If the closure has two parameters it is used like a traditional Comparator. I.e. it should compare its two parameters for order, returning a negative integer, zero, or a positive integer when the first parameter is less than, equal to, or greater than the second respectively. Otherwise, the Closure is assumed to take a single parameter and return a Comparable (typically an Integer) which is then used for further comparison.

        assert "hello" == ["hello","hi","hey"].max { it.length() }

        assert "hello" == ["hello","hi","hey"].max { a, b -> a.length() <=> b.length() }

         def pets = ['dog', 'elephant', 'anaconda']
         def longestName = pets.max{ it.size() } // one of 'elephant' or 'anaconda'
         assert longestName.size() == 8

    Parameters:
      `self` - an Iterable
      `closure` - a 1 or 2 arg Closure used to determine the correct ordering
    Returns:
      an item from the Iterable having the maximum value returned by calling the supplied closure with that item as parameter or null for an empty Iterable
    Since:
      2.2.0

  - ### max

    public static <T> T max(Iterator<T> self, Closure closure)
    Selects the maximum value found from the Iterator using the closure to determine the correct ordering. The iterator will become exhausted of elements after this operation.

    If the closure has two parameters it is used like a traditional Comparator. I.e. it should compare its two parameters for order, returning a negative integer, zero, or a positive integer when the first parameter is less than, equal to, or greater than the second respectively. Otherwise, the Closure is assumed to take a single parameter and return a Comparable (typically an Integer) which is then used for further comparison.

    Parameters:
      `self` - an Iterator
      `closure` - a Closure used to determine the correct ordering
    Returns:
      the maximum value
    Since:
      1.5.5

  - ### max

    public static <T> T max(T[] self, Closure closure)
    Selects the maximum value found from the Object array using the closure to determine the correct ordering.

    If the closure has two parameters it is used like a traditional Comparator. I.e. it should compare its two parameters for order, returning a negative integer, zero, or a positive integer when the first parameter is less than, equal to, or greater than the second respectively. Otherwise, the Closure is assumed to take a single parameter and return a Comparable (typically an Integer) which is then used for further comparison.

    Parameters:
      `self` - an array
      `closure` - a Closure used to determine the correct ordering
    Returns:
      the maximum value
    Since:
      1.5.5
    See Also:
      - `max(Iterator, groovy.lang.Closure)`

  - ### max

    public static <T> T max(Iterable<T> self, Comparator<? super T> comparator)
    Selects the maximum value found in the Iterable using the given comparator.

         assert "hello" == ["hello","hi","hey"].max( { a, b -> a.length() <=> b.length() } as Comparator )

    Parameters:
      `self` - an Iterable
      `comparator` - a Comparator
    Returns:
      the maximum value or null for an empty Iterable
    Since:
      2.2.0
    See Also:
      - `max(Iterator, Comparator)`

  - ### max

    public static <T> T max(Iterator<T> self, Comparator<? super T> comparator)
    Selects the maximum value found from the Iterator using the given comparator.
    Parameters:
      `self` - an Iterator
      `comparator` - a Comparator
    Returns:
      the maximum value
    Since:
      1.5.5

  - ### max

    public static <T> T max(T[] self, Comparator<? super T> comparator)
    Selects the maximum value found from the Object array using the given comparator.
    Parameters:
      `self` - an array
      `comparator` - a Comparator
    Returns:
      the maximum value
    Since:
      1.5.5
    See Also:
      - `max(Iterator, Comparator)`

  - ### getIndices

    public static IntRange getIndices(Collection self)
    Returns indices of the collection.

    Example:

         assert 0..2 == [5, 6, 7].indices

    Parameters:
      `self` - a collection
    Returns:
      an index range
    Since:
      2.4.0

  - ### getIndices

    public static <T> IntRange getIndices(T[] self)
    Returns indices of the array.

    Example:

         String[] letters = ['a', 'b', 'c', 'd']
         assert 0..<4 == letters.indices

    Parameters:
      `self` - an array
    Returns:
      an index range
    Since:
      2.4.0

  - ### getIndices

    public static IntRange getIndices(boolean[] self)
    Returns indices of the boolean array.
    Since:
      3.0.8
    See Also:
      - `getIndices(Object[])`

  - ### getIndices

    public static IntRange getIndices(byte[] self)
    Returns indices of the byte array.
    Since:
      3.0.8
    See Also:
      - `getIndices(Object[])`

  - ### getIndices

    public static IntRange getIndices(char[] self)
    Returns indices of the char array.
    Since:
      3.0.8
    See Also:
      - `getIndices(Object[])`

  - ### getIndices

    public static IntRange getIndices(double[] self)
    Returns indices of the double array.
    Since:
      3.0.8
    See Also:
      - `getIndices(Object[])`

  - ### getIndices

    public static IntRange getIndices(float[] self)
    Returns indices of the float array.
    Since:
      3.0.8
    See Also:
      - `getIndices(Object[])`

  - ### getIndices

    public static IntRange getIndices(int[] self)
    Returns indices of the int array.
    Since:
      3.0.8
    See Also:
      - `getIndices(Object[])`

  - ### getIndices

    public static IntRange getIndices(long[] self)
    Returns indices of the long array.
    Since:
      3.0.8
    See Also:
      - `getIndices(Object[])`

  - ### getIndices

    public static IntRange getIndices(short[] self)
    Returns indices of the short array.
    Since:
      3.0.8
    See Also:
      - `getIndices(Object[])`

  - ### size

    public static int size(Iterator self)
    Provide the standard Groovy `size()` method for `Iterator`. The iterator will become exhausted of elements after determining the size value.
    Parameters:
      `self` - an Iterator
    Returns:
      the length of the Iterator
    Since:
      1.5.5

  - ### size

    public static int size(Iterable self)
    Provide the standard Groovy `size()` method for `Iterable`.

         def items = [1, 2, 3]
         def iterable = { [ hasNext:{ !items.isEmpty() }, next:{ items.pop() } ] as Iterator } as Iterable
         assert iterable.size() == 3

    Parameters:
      `self` - an Iterable
    Returns:
      the length of the Iterable
    Since:
      2.3.8

  - ### size

    public static int size(Object[] self)
    Provide the standard Groovy `size()` method for an array.
    Parameters:
      `self` - an Array of objects
    Returns:
      the size (length) of the Array
    Since:
      1.0

  - ### isEmpty

    public static boolean isEmpty(Iterable self)
    Check whether an `Iterable` has elements

         def items = [1]
         def iterable = { [ hasNext:{ !items.isEmpty() }, next:{ items.pop() } ] as Iterator } as Iterable
         assert !iterable.isEmpty()
         iterable.iterator().next()
         assert iterable.isEmpty()

    Parameters:
      `self` - an Iterable
    Returns:
      true if the iterable has no elements, false otherwise
    Since:
      2.5.0

  - ### getAt

    public static <T> List<T> getAt(List<T> self, Range range)
    Support the range subscript operator for a List.

        def list = [1, "a", 4.5, true]
         assert list[1..2] == ["a", 4.5]

    Parameters:
      `self` - a List
      `range` - a Range indicating the items to get
    Returns:
      a new list instance based on range borders
    Since:
      1.0

  - ### getAt

    public static <T> List<T> getAt(ListWithDefault<T> self, Collection indices)
    Select a List of items from an eager or lazy List using a Collection to identify the indices to be selected.

        def list = [].withDefault { 42 }
         assert list[1,0,2] == [42, 42, 42]

    Parameters:
      `self` - a ListWithDefault
      `indices` - a Collection of indices
    Returns:
      a new eager or lazy list of the values at the given indices

  - ### getAt

    public static <T> List<T> getAt(ListWithDefault<T> self, Range range)
    Support the range subscript operator for an eager or lazy List.

        def list = [].withDefault { 42 }
         assert list[1..2] == [null, 42]

    Parameters:
      `self` - a ListWithDefault
      `range` - a Range indicating the items to get
    Returns:
      a new eager or lazy list instance based on range borders

  - ### getAt

    public static <T> List<T> getAt(ListWithDefault<T> self, EmptyRange range)
    Support the range subscript operator for an eager or lazy List.

         def list = [true, 1, 3.4].withDefault{ 42 }
         assert list[0..<0] == []

    Parameters:
      `self` - a ListWithDefault
      `range` - a Range indicating the items to get
    Returns:
      a new list instance based on range borders

  - ### getAt

    public static <T> List<T> getAt(List<T> self, EmptyRange range)
    Support the range subscript operator for a List.

         def list = [true, 1, 3.4]
         assert list[0..<0] == []

    Parameters:
      `self` - a List
      `range` - a Range indicating the items to get
    Returns:
      a new list instance based on range borders
    Since:
      1.0

  - ### getAt

    public static <T> List<T> getAt(List<T> self, Collection indices)
    Select a List of items from a List using a Collection to identify the indices to be selected.

        def list = [true, 1, 3.4, false]
         assert list[1,0,2] == [1, true, 3.4]

    Parameters:
      `self` - a List
      `indices` - a Collection of indices
    Returns:
      a new list of the values at the given indices
    Since:
      1.0

  - ### getAt

    public static <T> List<T> getAt(T[] self, Collection indices)
    Select a List of items from an array using a Collection to identify the indices to be selected.
    Parameters:
      `self` - an array
      `indices` - a Collection of indices
    Returns:
      a new list of the values at the given indices
    Since:
      1.0

  - ### subMap

    public static <K, V> Map<K,V> subMap(Map<K,V> map, Collection<K> keys)
    Creates a sub-Map containing the given keys. This method is similar to List.subList() but uses keys rather than index ranges.

        assert [1:10, 2:20, 4:40].subMap( [2, 4] ) == [2:20, 4:40]

    Parameters:
      `map` - a Map
      `keys` - a Collection of keys
    Returns:
      a new Map containing the given keys
    Since:
      1.0

  - ### subMap

    public static <K, V> Map<K,V> subMap(Map<K,V> map, K[] keys)
    Creates a sub-Map containing the given keys. This method is similar to List.subList() but uses keys rather than index ranges. The original map is unaltered.

         def orig = [1:10, 2:20, 3:30, 4:40]
         assert orig.subMap([1, 3] as int[]) == [1:10, 3:30]
         assert orig.subMap([2, 4] as Integer[]) == [2:20, 4:40]
         assert orig.size() == 4

    Parameters:
      `map` - a Map
      `keys` - an array of keys
    Returns:
      a new Map containing the given keys
    Since:
      2.1.0

  - ### get

    public static <K, V> V get(Map<K,V> map, K key, V defaultValue)
    Looks up an item in a Map for the given key and returns the corresponding value. If there is no entry for the given key return instead the default value and also add the key and default value to the map.

         def map=[:]
         map.get("a", []) << 5
         assert map == [a:[5]]

    For a method which doesn't mutate the map, consider instead using `Map.getOrDefault(Object, Object)` or consider using Groovy's `MapWithDefault` often instantiated using `withDefault(Map, Closure)` or with more options `withDefault(Map, boolean, boolean, Closure)`.
    Parameters:
      `map` - a Map
      `key` - the key to look up the value
      `defaultValue` - the value to return and add to the map for this key if there is no entry for the given key
    Returns:
      the value of the given key or the default value, added to the map if the key did not exist
    Since:
      1.0

  - ### getAt

    public static <T> List<T> getAt(T[] array, Range range)
    Support the range subscript operator for an Array
    Parameters:
      `array` - an Array of Objects
      `range` - a Range
    Returns:
      a range of a list from the range's from index up to but not including the range's to value
    Since:
      1.0

  - ### getAt

    public static <T> List<T> getAt(T[] array, IntRange range)
    Parameters:
      `array` - an Array of Objects
      `range` - an IntRange
    Returns:
      a range of a list from the range's from index up to but not including the range's to value
    Since:
      1.0

  - ### getAt

    public static <T> List<T> getAt(T[] array, EmptyRange range)
    Parameters:
      `array` - an Array of Objects
      `range` - an EmptyRange
    Returns:
      an empty Range
    Since:
      1.5.0

  - ### getAt

    public static <T> List<T> getAt(T[] array, ObjectRange range)
    Parameters:
      `array` - an Array of Objects
      `range` - an ObjectRange
    Returns:
      a range of a list from the range's from index up to but not including the range's to value
    Since:
      1.0

  - ### toList

    public static <T> List<T> toList(T[] array)
    Allows conversion of arrays into a mutable List.
    Parameters:
      `array` - an Array of Objects
    Returns:
      the array as a List
    Since:
      1.0

  - ### getAt

    public static <T> T getAt(List<T> self, int idx)
    Support the subscript operator for a List.

        def list = [2, "a", 5.3]
         assert list[1] == "a"

    Parameters:
      `self` - a List
      `idx` - an index
    Returns:
      the value at the given index
    Since:
      1.0

  - ### getAt

    public static <T> T getAt(List<T> self, Number idx)
    Support subscript operator for list access.

  - ### getAt

    public static <T> T getAt(Iterator<T> self, int idx)
    Support the subscript operator for an Iterator. The iterator will be partially exhausted up until the idx entry after returning if a +ve or 0 idx is used, or fully exhausted if a -ve idx is used or no corresponding entry was found. Typical usage:

         def iter = [2, "a", 5.3].iterator()
         assert iter[1] == "a"

    A more elaborate example:

         def items = [2, "a", 5.3]
         def iter = items.iterator()
         assert iter[-1] == 5.3
         // iter exhausted, so reset
         iter = items.iterator()
         assert iter[1] == "a"
         // iter partially exhausted so now idx starts after "a"
         assert iter[0] == 5.3

    Parameters:
      `self` - an Iterator
      `idx` - an index value (-self.size() <= idx < self.size())
    Returns:
      the value at the given index (after normalisation) or null if no corresponding value was found
    Since:
      1.7.2

  - ### getAt

    public static <T> T getAt(Iterable<T> self, int idx)
    Support the subscript operator for an Iterable. Typical usage:

         // custom Iterable example:
         class MyIterable implements Iterable {
           Iterator iterator() { [1, 2, 3].iterator() }
         }
         def myIterable = new MyIterable()
         assert myIterable[1] == 2

         // Set example:
         def set = [1,2,3] as LinkedHashSet
         assert set[1] == 2

    Parameters:
      `self` - an Iterable
      `idx` - an index value (-self.size() <= idx < self.size()) but using -ve index values will be inefficient
    Returns:
      the value at the given index (after normalisation) or null if no corresponding value was found
    Since:
      2.1.0

  - ### putAt

    public static <T> void putAt(List<T> self, int idx, T value)
    A helper method to allow lists to work with subscript operators.

        def list = [2, 3]
         list[0] = 1
         assert list == [1, 3]

    Parameters:
      `self` - a List
      `idx` - an index
      `value` - the value to put at the given index
    Since:
      1.0

  - ### putAt

    public static <T> void putAt(List<T> self, Number idx, T value)
    Support subscript operator for list modification.

  - ### putAt

    public static void putAt(List self, EmptyRange range, Object value)
    A helper method to allow lists to work with subscript operators.

         def list = ["a", true]
         list[1..<1] = 5
         assert list == ["a", 5, true]

    Parameters:
      `self` - a List
      `range` - the (in this case empty) subset of the list to set
      `value` - the values to put at the given sublist or a Collection of values
    Since:
      1.0

  - ### putAt

    public static void putAt(List self, EmptyRange range, Collection value)
    A helper method to allow lists to work with subscript operators.

         def list = ["a", true]
         list[1..<1] = [4, 3, 2]
         assert list == ["a", 4, 3, 2, true]

    Parameters:
      `self` - a List
      `range` - the (in this case empty) subset of the list to set
      `value` - the Collection of values
    Since:
      1.0
    See Also:
      - `putAt(java.util.List, groovy.lang.EmptyRange, java.lang.Object)`

  - ### putAt

    public static void putAt(List self, IntRange range, Collection col)
    List subscript assignment operator when given a range as the index and the assignment operand is a collection. Example:

        def myList = [4, 3, 5, 1, 2, 8, 10]
         myList[3..5] = ["a", true]
         assert myList == [4, 3, 5, "a", true, 10]

    Items in the given range are replaced with items from the collection.
    Parameters:
      `self` - a List
      `range` - the subset of the list to set
      `col` - the collection of values to put at the given sublist
    Since:
      1.5.0

  - ### putAt

    public static void putAt(List self, IntRange range, Object value)
    List subscript assignment operator when given a range as the index. Example:

        def myList = [4, 3, 5, 1, 2, 8, 10]
         myList[3..5] = "b"
         assert myList == [4, 3, 5, "b", 10]

    Items in the given range are replaced with the operand. The `value` operand is always treated as a single value.
    Parameters:
      `self` - a List
      `range` - the subset of the list to set
      `value` - the value to put at the given sublist
    Since:
      1.0

  - ### putAt

    public static void putAt(List self, List splice, List values)
    A helper method to allow lists to work with subscript operators.

        def list = ["a", true, 42, 9.4]
         list[1, 4] = ["x", false]
         assert list == ["a", "x", 42, 9.4, false]

    Parameters:
      `self` - a List
      `splice` - the subset of the list to set
      `values` - the value to put at the given sublist
    Since:
      1.0

  - ### putAt

    public static void putAt(List self, List splice, Object value)
    A helper method to allow lists to work with subscript operators.

        def list = ["a", true, 42, 9.4]
         list[1, 3] = 5
         assert list == ["a", 5, 42, 5]

    Parameters:
      `self` - a List
      `splice` - the subset of the list to set
      `value` - the value to put at the given sublist
    Since:
      1.0

  - ### getSubList

    @Deprecated protected static List getSubList(List self, List splice)
    Deprecated.

  - ### getAt

    public static <K, V> V getAt(Map<K,V> self, Object key)
    Support the subscript operator for a Map.

        def map = [a:10]
         assert map["a"] == 10

    Parameters:
      `self` - a Map
      `key` - an Object as a key for the map
    Returns:
      the value corresponding to the given key
    Since:
      1.0

  - ### plus

    public static <K, V> Map<K,V> plus(Map<K,V> left, Map<K,V> right)
    Returns a new `Map` containing all entries from `left` and `right`, giving precedence to `right`. Any keys appearing in both Maps will appear in the resultant map with values from the `right` operand. If the `left` map is one of TreeMap, LinkedHashMap, Hashtable or Properties, the returned Map will preserve that type, otherwise a HashMap will be returned.

    Roughly equivalent to `Map m = new HashMap(); m.putAll(left); m.putAll(right); return m;` but with some additional logic to preserve the `left` Map type for common cases as described above.

         assert [a:10, b:20] + [a:5, c:7] == [a:5, b:20, c:7]

    Parameters:
      `left` - a Map
      `right` - a Map
    Returns:
      a new Map containing all entries from left and right
    Since:
      1.5.0

  - ### putAt

    public static <K, V> V putAt(Map<K,V> self, K key, V value)
    A helper method to allow maps to work with subscript operators
    Parameters:
      `self` - a Map
      `key` - an Object as a key for the map
      `value` - the value to put into the map
    Returns:
      the value corresponding to the given key
    Since:
      1.0

  - ### getAt

    public static List getAt(Collection coll, String property)
    Support the subscript operator for Collection.

         assert [String, Long, Integer] == ["a",5L,2]["class"]

    Parameters:
      `coll` - a Collection
      `property` - a String
    Returns:
      a List
    Since:
      1.0

  - ### asImmutable

    public static <K, V> Map<K,V> asImmutable(Map<K,V> self)
    A convenience method for creating an immutable Map.
    Parameters:
      `self` - a Map
    Returns:
      an unmodifiable view of a copy of the original, i.e. an effectively immutable copy
    Since:
      1.0
    See Also:
      - `asImmutable(java.util.List)`
      - `asUnmodifiable(java.util.Map)`

  - ### asImmutable

    public static <K, V> SortedMap<K,V> asImmutable(SortedMap<K,V> self)
    A convenience method for creating an immutable SortedMap.
    Parameters:
      `self` - a SortedMap
    Returns:
      an unmodifiable view of a copy of the original, i.e. an effectively immutable copy
    Since:
      1.0
    See Also:
      - `asImmutable(java.util.List)`
      - `asUnmodifiable(java.util.SortedMap)`

  - ### asImmutable

    public static <T> List<T> asImmutable(List<T> self)
    A convenience method for creating an immutable List.

         def mutable = [1,2,3]
         def immutable = mutable.asImmutable()
         try {
             immutable << 4
             assert false
         } catch (UnsupportedOperationException) {
             assert true
         }
         mutable << 4
         assert mutable.size() == 4
         assert immutable.size() == 3

    Parameters:
      `self` - a List
    Returns:
      an unmodifiable view of a copy of the original, i.e. an effectively immutable copy
    Since:
      1.0
    See Also:
      - `asUnmodifiable(java.util.List)`

  - ### asImmutable

    public static <T> Set<T> asImmutable(Set<T> self)
    A convenience method for creating an immutable Set.
    Parameters:
      `self` - a Set
    Returns:
      an unmodifiable view of a copy of the original, i.e. an effectively immutable copy
    Since:
      1.0
    See Also:
      - `asImmutable(java.util.List)`
      - `asUnmodifiable(java.util.Set)`

  - ### asImmutable

    public static <T> SortedSet<T> asImmutable(SortedSet<T> self)
    A convenience method for creating an immutable SortedSet.
    Parameters:
      `self` - a SortedSet
    Returns:
      an unmodifiable view of a copy of the original, i.e. an effectively immutable copy
    Since:
      1.0
    See Also:
      - `asImmutable(java.util.List)`
      - `asUnmodifiable(java.util.SortedSet)`

  - ### asImmutable

    public static <T> Collection<T> asImmutable(Collection<T> self)
    A convenience method for creating an immutable Collection.
    Parameters:
      `self` - a Collection
    Returns:
      an unmodifiable view of a copy of the original, i.e. an effectively immutable copy
    Since:
      1.5.0
    See Also:
      - `asImmutable(java.util.List)`
      - `asUnmodifiable(java.util.Collection)`

  - ### asUnmodifiable

    public static <K, V> Map<K,V> asUnmodifiable(Map<K,V> self)
    Creates an unmodifiable view of a Map.
    Parameters:
      `self` - a Map
    Returns:
      an unmodifiable view of the Map
    Since:
      2.5.0
    See Also:
      - `Collections.unmodifiableMap(java.util.Map)`
      - `asUnmodifiable(java.util.List)`

  - ### asUnmodifiable

    public static <K, V> SortedMap<K,V> asUnmodifiable(SortedMap<K,V> self)
    Creates an unmodifiable view of a SortedMap.
    Parameters:
      `self` - a SortedMap
    Returns:
      an unmodifiable view of the SortedMap
    Since:
      2.5.0
    See Also:
      - `Collections.unmodifiableSortedMap(java.util.SortedMap)`
      - `asUnmodifiable(java.util.List)`

  - ### asUnmodifiable

    public static <T> List<T> asUnmodifiable(List<T> self)
    Creates an unmodifiable view of a List.

         def mutable = [1,2,3]
         def unmodifiable = mutable.asUnmodifiable()
         try {
             unmodifiable << 4
             assert false
         } catch (UnsupportedOperationException) {
             assert true
         }
         mutable << 4
         assert unmodifiable.size() == 4

    Parameters:
      `self` - a List
    Returns:
      an unmodifiable view of the List
    Since:
      2.5.0
    See Also:
      - `Collections.unmodifiableList(java.util.List)`

  - ### asUnmodifiable

    public static <T> Set<T> asUnmodifiable(Set<T> self)
    Creates an unmodifiable view of a Set.
    Parameters:
      `self` - a Set
    Returns:
      an unmodifiable view of the Set
    Since:
      2.5.0
    See Also:
      - `Collections.unmodifiableSet(java.util.Set)`
      - `asUnmodifiable(java.util.List)`

  - ### asUnmodifiable

    public static <T> SortedSet<T> asUnmodifiable(SortedSet<T> self)
    Creates an unmodifiable view of a SortedSet.
    Parameters:
      `self` - a SortedSet
    Returns:
      an unmodifiable view of the SortedSet
    Since:
      2.5.0
    See Also:
      - `Collections.unmodifiableSortedSet(java.util.SortedSet)`
      - `asUnmodifiable(java.util.List)`

  - ### asUnmodifiable

    public static <T> Collection<T> asUnmodifiable(Collection<T> self)
    Creates an unmodifiable view of a Collection.
    Parameters:
      `self` - a Collection
    Returns:
      an unmodifiable view of the Collection
    Since:
      2.5.0
    See Also:
      - `Collections.unmodifiableCollection(java.util.Collection)`
      - `asUnmodifiable(java.util.List)`

  - ### asSynchronized

    public static <K, V> Map<K,V> asSynchronized(Map<K,V> self)
    A convenience method for creating a synchronized Map.
    Parameters:
      `self` - a Map
    Returns:
      a synchronized Map
    Since:
      1.0
    See Also:
      - `Collections.synchronizedMap(java.util.Map)`

  - ### asSynchronized

    public static <K, V> SortedMap<K,V> asSynchronized(SortedMap<K,V> self)
    A convenience method for creating a synchronized SortedMap.
    Parameters:
      `self` - a SortedMap
    Returns:
      a synchronized SortedMap
    Since:
      1.0
    See Also:
      - `Collections.synchronizedSortedMap(java.util.SortedMap)`

  - ### asSynchronized

    public static <T> Collection<T> asSynchronized(Collection<T> self)
    A convenience method for creating a synchronized Collection.
    Parameters:
      `self` - a Collection
    Returns:
      a synchronized Collection
    Since:
      1.0
    See Also:
      - `Collections.synchronizedCollection(java.util.Collection)`

  - ### asSynchronized

    public static <T> List<T> asSynchronized(List<T> self)
    A convenience method for creating a synchronized List.
    Parameters:
      `self` - a List
    Returns:
      a synchronized List
    Since:
      1.0
    See Also:
      - `Collections.synchronizedList(java.util.List)`

  - ### asSynchronized

    public static <T> Set<T> asSynchronized(Set<T> self)
    A convenience method for creating a synchronized Set.
    Parameters:
      `self` - a Set
    Returns:
      a synchronized Set
    Since:
      1.0
    See Also:
      - `Collections.synchronizedSet(java.util.Set)`

  - ### asSynchronized

    public static <T> SortedSet<T> asSynchronized(SortedSet<T> self)
    A convenience method for creating a synchronized SortedSet.
    Parameters:
      `self` - a SortedSet
    Returns:
      a synchronized SortedSet
    Since:
      1.0
    See Also:
      - `Collections.synchronizedSortedSet(java.util.SortedSet)`

  - ### spread

    public static SpreadMap spread(Map self)
    Synonym for `toSpreadMap(java.util.Map)`.
    Parameters:
      `self` - a map
    Returns:
      a newly created SpreadMap
    Since:
      1.0

  - ### toSpreadMap

    public static SpreadMap toSpreadMap(Map self)
    Returns a new `SpreadMap` from this map.

    The example below shows the various possible use cases:

         def fn(Map m) { return m.a + m.b + m.c + m.d }

         assert fn(a:1, b:2, c:3, d:4) == 10
         assert fn(a:1, *:[b:2, c:3], d:4) == 10
         assert fn([a:1, b:2, c:3, d:4].toSpreadMap()) == 10
         assert fn((['a', 1, 'b', 2, 'c', 3, 'd', 4] as Object[]).toSpreadMap()) == 10
         assert fn(['a', 1, 'b', 2, 'c', 3, 'd', 4].toSpreadMap()) == 10
         assert fn(['abcd'.toList(), 1..4].transpose().flatten().toSpreadMap()) == 10

    Note that toSpreadMap() is not normally used explicitly but under the covers by Groovy.
    Parameters:
      `self` - a map to be converted into a SpreadMap
    Returns:
      a newly created SpreadMap if this map is not null and its size is positive.
    Since:
      1.0
    See Also:
      - `SpreadMap(java.util.Map)`

  - ### toSpreadMap

    public static SpreadMap toSpreadMap(Object[] self)
    Creates a spreadable map from this array.

    Parameters:
      `self` - an object array
    Returns:
      a newly created SpreadMap
    Since:
      1.0
    See Also:
      - `SpreadMap(java.lang.Object[])`
      - `toSpreadMap(java.util.Map)`

  - ### toSpreadMap

    public static SpreadMap toSpreadMap(List self)
    Creates a spreadable map from this list.

    Parameters:
      `self` - a list
    Returns:
      a newly created SpreadMap
    Since:
      1.8.0
    See Also:
      - `SpreadMap(java.util.List)`
      - `toSpreadMap(java.util.Map)`

  - ### toSpreadMap

    public static SpreadMap toSpreadMap(Iterable self)
    Creates a spreadable map from this iterable.

    Parameters:
      `self` - an iterable
    Returns:
      a newly created SpreadMap
    Since:
      2.4.0
    See Also:
      - `SpreadMap(java.util.List)`
      - `toSpreadMap(java.util.Map)`

  - ### withDefault

    public static <K, V> Map<K,V> withDefault(Map<K,V> self, Closure<V> init)
    Wraps a map using the decorator pattern with a wrapper that intercepts all calls to `get(key)`. If an unknown key is found, a default value will be stored into the Map before being returned. The default value stored will be the result of calling the supplied Closure with the key as the parameter to the Closure. Example usage:

         def map = [a:1, b:2].withDefault{ k -> k.toCharacter().isLowerCase() ? 10 : -10 }
         def expected = [a:1, b:2, c:10, D:-10]
         assert expected.every{ e -> e.value == map[e.key] }

         def constMap = [:].withDefault{ 42 }
         assert constMap.foo == 42
         assert constMap.size() == 1

    Parameters:
      `self` - a Map
      `init` - a Closure which is passed the unknown key
    Returns:
      the wrapped Map
    Since:
      1.7.1
    See Also:
      - `withDefault(Map, boolean, boolean, Closure)`

  - ### withDefault

    public static <K, V> Map<K,V> withDefault(Map<K,V> self, boolean autoGrow, boolean autoShrink, Closure<V> init)
    Wraps a map using the decorator pattern with a wrapper that intercepts all calls to `get(key)` and `put(key, value)`. If an unknown key is found for `get`, a default value will be returned. The default value will be the result of calling the supplied Closure with the key as the parameter to the Closure. If `autoGrow` is set, the value will be stored into the map. If `autoShrink` is set, then an attempt to `put` the default value into the map is ignored and indeed any existing value would be removed. If you wish the backing map to be as small as possible, consider setting `autoGrow` to `false` and `autoShrink` to `true`. This keeps the backing map as small as possible, i.e. sparse, but also means that `containsKey`, `keySet`, `size`, and other methods will only reflect the sparse values. If you are wrapping an immutable map, you should set `autoGrow` and `autoShrink` to `false`. In this scenario, the `get` method is essentially a shorthand for calling `getOrDefault` with the default value supplied once as a Closure. Example usage:

         // sparse map example
         def answers = [life: 100].withDefault(false, true){ 42 }
         assert answers.size() == 1
         assert answers.foo == 42
         assert answers.size() == 1
         answers.life = 42
         answers.putAll(universe: 42, everything: 42)
         assert answers.size() == 0

         // immutable map example
         def certainties = [death: true, taxes: true].asImmutable().withDefault(false, false){ false }
         assert certainties.size() == 2
         assert certainties.wealth == false
         assert certainties.size() == 2

    Parameters:
      `self` - a Map
      `autoGrow` - whether calling get could potentially grow the map if the key isn't found
      `autoShrink` - whether calling put with the default value could potentially shrink the map
      `init` - a Closure which is passed the unknown key
    Returns:
      the wrapped Map
    Since:
      4.0.1

  - ### withDefault

    public static <T> ListWithDefault<T> withDefault(List<T> self, Closure<T> init)
    An alias for `withLazyDefault` which decorates a list allowing it to grow when called with index values outside the normal list bounds.
    Parameters:
      `self` - a List
      `init` - a Closure with the target index as parameter which generates the default value
    Returns:
      the decorated List
    Since:
      1.8.7
    See Also:
      - `withLazyDefault(java.util.List, groovy.lang.Closure)`
      - `withEagerDefault(java.util.List, groovy.lang.Closure)`

  - ### withDefault$$bridge

    @Deprecated public static <T> List<T> withDefault$$bridge(List<T> self, Closure<T> init)
    Deprecated.

  - ### withLazyDefault

    public static <T> ListWithDefault<T> withLazyDefault(List<T> self, Closure<T> init)
    Decorates a list allowing it to grow when called with a non-existent index value. When called with such values, the list is grown in size and a default value is placed in the list by calling a supplied `init` Closure. Subsequent retrieval operations if finding a null value in the list assume it was set as null from an earlier growing operation and again call the `init` Closure to populate the retrieved value; consequently the list can't be used to store null values.

    How it works: The decorated list intercepts all calls to `getAt(index)` and `get(index)`. If an index greater than or equal to the current `size()` is used, the list will grow automatically up to the specified index. Gaps will be filled by `null`. If a default value should also be used to fill gaps instead of `null`, use `withEagerDefault`. If `getAt(index)` or `get(index)` are called and a null value is found, it is assumed that the null value was a consequence of an earlier grow list operation and the `init` Closure is called to populate the value.

    Example usage:

         def list = [0, 1].withLazyDefault{ 42 }
         assert list[0] == 0
         assert list[1] == 1
         assert list[3] == 42   // default value
         assert list == [0, 1, null, 42] // gap filled with null

         // illustrate using the index when generating default values
         def list2 = [5].withLazyDefault{ index -> index * index }
         assert list2[3] == 9
         assert list2 == [5, null, null, 9]
         assert list2[2] == 4
         assert list2 == [5, null, 4, 9]

         // illustrate what happens with null values
         list2[2] = null
         assert list2[2] == 4

    Parameters:
      `self` - a List
      `init` - a Closure with the target index as parameter which generates the default value
    Returns:
      the decorated List
    Since:
      1.8.7

  - ### withLazyDefault$$bridge

    @Deprecated public static <T> List<T> withLazyDefault$$bridge(List<T> self, Closure<T> init)
    Deprecated.

  - ### withEagerDefault

    public static <T> ListWithDefault<T> withEagerDefault(List<T> self, Closure<T> init)
    Decorates a list allowing it to grow when called with a non-existent index value. When called with such values, the list is grown in size and a default value is placed in the list by calling a supplied `init` Closure. Null values can be stored in the list.

    How it works: The decorated list intercepts all calls to `getAt(index)` and `get(index)`. If an index greater than or equal to the current `size()` is used, the list will grow automatically up to the specified index. Gaps will be filled by calling the `init` Closure. If generating a default value is a costly operation consider using `withLazyDefault`.

    Example usage:

         def list = [0, 1].withEagerDefault{ 42 }
         assert list[0] == 0
         assert list[1] == 1
         assert list[3] == 42   // default value
         assert list == [0, 1, 42, 42]   // gap filled with default value

         // illustrate using the index when generating default values
         def list2 = [5].withEagerDefault{ index -> index * index }
         assert list2[3] == 9
         assert list2 == [5, 1, 4, 9]

         // illustrate what happens with null values
         list2[2] = null
         assert list2[2] == null
         assert list2 == [5, 1, null, 9]

    Parameters:
      `self` - a List
      `init` - a Closure with the target index as parameter which generates the default value
    Returns:
      the wrapped List
    Since:
      1.8.7

  - ### withEagerDefault$$bridge

    @Deprecated public static <T> List<T> withEagerDefault$$bridge(List<T> self, Closure<T> init)
    Deprecated.

  - ### withIndex

    public static <E> List<Tuple2<E,Integer>> withIndex(Iterable<E> self)
    Zips an Iterable with indices in (value, index) order.

    Example usage:

         assert [["a", 0], ["b", 1]] == ["a", "b"].withIndex()
         assert ["0: a", "1: b"] == ["a", "b"].withIndex().collect { str, idx -> "$idx: $str" }

    Parameters:
      `self` - an Iterable
    Returns:
      a zipped list with indices
    Since:
      2.4.0
    See Also:
      - `indexed(Iterable)`

  - ### indexed

    public static <E> Map<Integer,E> indexed(Iterable<E> self)
    Zips an Iterable with indices in (index, value) order.

    Example usage:

         assert [0: "a", 1: "b"] == ["a", "b"].indexed()
         assert ["0: a", "1: b"] == ["a", "b"].indexed().collect { idx, str -> "$idx: $str" }

    Parameters:
      `self` - an Iterable
    Returns:
      a zipped map with indices
    Since:
      2.4.0
    See Also:
      - `withIndex(Iterable)`

  - ### withIndex

    public static <E> List<Tuple2<E,Integer>> withIndex(Iterable<E> self, int offset)
    Zips an Iterable with indices in (value, index) order.

    Example usage:

         assert [["a", 5], ["b", 6]] == ["a", "b"].withIndex(5)
         assert ["1: a", "2: b"] == ["a", "b"].withIndex(1).collect { str, idx -> "$idx: $str" }

    Parameters:
      `self` - an Iterable
      `offset` - an index to start from
    Returns:
      a zipped list with indices
    Since:
      2.4.0
    See Also:
      - `indexed(Iterable, int)`

  - ### indexed

    public static <E> Map<Integer,E> indexed(Iterable<E> self, int offset)
    Zips an Iterable with indices in (index, value) order.

    Example usage:

         assert [5: "a", 6: "b"] == ["a", "b"].indexed(5)
         assert ["1: a", "2: b"] == ["a", "b"].indexed(1).collect { idx, str -> "$idx: $str" }

    Parameters:
      `self` - an Iterable
      `offset` - an index to start from
    Returns:
      a Map (since the keys/indices are unique) containing the elements from the iterable zipped with indices
    Since:
      2.4.0
    See Also:
      - `withIndex(Iterable, int)`

  - ### indexed

    public static Map<Integer,Integer> indexed(int[] self)
    Zips an int[] with indices in (index, value) order starting from index 0.
    Since:
      3.0.8
    See Also:
      - `indexed(int[], int)`

  - ### indexed

    public static Map<Integer,Integer> indexed(int[] self, int offset)
    Zips an int[] with indices in (index, value) order.

    Example usage:

         int[] nums = [10, 20, 30]
         assert [5: 10, 6: 20, 7: 30] == nums.indexed(5)
         assert ["1: 10", "2: 20", "3: 30"] == nums.indexed(1).collect { idx, str -> "$idx: $str" }

    Parameters:
      `self` - an Iterable
      `offset` - an index to start from
    Returns:
      a Map (since the keys/indices are unique) containing the elements from the iterable zipped with indices
    Since:
      3.0.8
    See Also:
      - `indexed(Iterable, int)`

  - ### indexed

    public static Map<Integer,Long> indexed(long[] self)
    Zips a long[] with indices in (index, value) order starting from index 0.
    Since:
      3.0.8
    See Also:
      - `indexed(long[], int)`

  - ### indexed

    public static Map<Integer,Long> indexed(long[] self, int offset)
    Zips a long[] with indices in (index, value) order.
    Parameters:
      `self` - a long[]
      `offset` - an index to start from
    Returns:
      a Map (since the keys/indices are unique) containing the elements from the iterable zipped with indices
    Since:
      3.0.8
    See Also:
      - `indexed(Iterable, int)`

  - ### indexed

    public static Map<Integer,Double> indexed(double[] self)
    Zips a double[] with indices in (index, value) order starting from index 0.
    Since:
      3.0.8
    See Also:
      - `indexed(double[], int)`

  - ### indexed

    public static Map<Integer,Double> indexed(double[] self, int offset)
    Zips a double[] with indices in (index, value) order.
    Parameters:
      `self` - a double[]
      `offset` - an index to start from
    Returns:
      a Map (since the keys/indices are unique) containing the elements from the iterable zipped with indices
    Since:
      3.0.8
    See Also:
      - `indexed(Iterable, int)`

  - ### withIndex

    public static <E> Iterator<Tuple2<E,Integer>> withIndex(Iterator<E> self)
    Zips an iterator with indices in (value, index) order.

    Example usage:

         assert [["a", 0], ["b", 1]] == ["a", "b"].iterator().withIndex().toList()
         assert ["0: a", "1: b"] == ["a", "b"].iterator().withIndex().collect { str, idx -> "$idx: $str" }.toList()

    Parameters:
      `self` - an iterator
    Returns:
      a zipped iterator with indices
    Since:
      2.4.0
    See Also:
      - `indexed(Iterator)`

  - ### indexed

    public static <E> Iterator<Tuple2<Integer,E>> indexed(Iterator<E> self)
    Zips an iterator with indices in (index, value) order.

    Example usage:

         assert [[0, "a"], [1, "b"]] == ["a", "b"].iterator().indexed().collect{ tuple -> [tuple.first, tuple.second] }
         assert ["0: a", "1: b"] == ["a", "b"].iterator().indexed().collect { idx, str -> "$idx: $str" }.toList()

    Parameters:
      `self` - an iterator
    Returns:
      a zipped iterator with indices
    Since:
      2.4.0
    See Also:
      - `withIndex(Iterator)`

  - ### withIndex

    public static <E> Iterator<Tuple2<E,Integer>> withIndex(Iterator<E> self, int offset)
    Zips an iterator with indices in (value, index) order.

    Example usage:

         assert [["a", 5], ["b", 6]] == ["a", "b"].iterator().withIndex(5).toList()
         assert ["1: a", "2: b"] == ["a", "b"].iterator().withIndex(1).collect { str, idx -> "$idx: $str" }.toList()

    Parameters:
      `self` - an iterator
      `offset` - an index to start from
    Returns:
      a zipped iterator with indices
    Since:
      2.4.0
    See Also:
      - `indexed(Iterator, int)`

  - ### indexed

    public static <E> Iterator<Tuple2<Integer,E>> indexed(Iterator<E> self, int offset)
    Zips an iterator with indices in (index, value) order.

    Example usage:

         assert [[5, "a"], [6, "b"]] == ["a", "b"].iterator().indexed(5).toList()
         assert ["a: 1", "b: 2"] == ["a", "b"].iterator().indexed(1).collect { idx, str -> "$str: $idx" }.toList()

    Parameters:
      `self` - an iterator
      `offset` - an index to start from
    Returns:
      a zipped iterator with indices
    Since:
      2.4.0
    See Also:
      - `withIndex(Iterator, int)`

  - ### sort

    public static <T> List<T> sort(Iterable<T> self)
    Sorts the Collection. Assumes that the collection items are comparable and uses their natural ordering to determine the resulting order. If the Collection is a List, it is sorted in place and returned. Otherwise, the elements are first placed into a new list which is then sorted and returned - leaving the original Collection unchanged.

        assert [1,2,3] == [3,1,2].sort()

    Parameters:
      `self` - the Iterable to be sorted
    Returns:
      the sorted Iterable as a List
    Since:
      2.2.0
    See Also:
      - `sort(Iterable, boolean)`

  - ### sort

    public static <T> List<T> sort(Iterable<T> self, boolean mutate)
    Sorts the Iterable. Assumes that the Iterable items are comparable and uses their natural ordering to determine the resulting order. If the Iterable is a List and mutate is true, it is sorted in place and returned. Otherwise, the elements are first placed into a new list which is then sorted and returned - leaving the original Iterable unchanged.

        assert [1,2,3] == [3,1,2].sort()

         def orig = [1, 3, 2]
         def sorted = orig.sort(false)
         assert orig == [1, 3, 2]
         assert sorted == [1, 2, 3]

    Parameters:
      `self` - the iterable to be sorted
      `mutate` - false will always cause a new list to be created, true will mutate lists in place
    Returns:
      the sorted iterable as a List
    Since:
      2.2.0

  - ### sort

    public static <K, V> Map<K,V> sort(Map<K,V> self, Closure closure)
    Sorts the elements from the given map into a new ordered map using the closure as a comparator to determine the ordering. The original map is unchanged.

        def map = [a:5, b:3, c:6, d:4].sort { a, b -> a.value <=> b.value }
         assert map == [b:3, d:4, a:5, c:6]

    Parameters:
      `self` - the original unsorted map
      `closure` - a Closure used as a comparator
    Returns:
      the sorted map
    Since:
      1.6.0

  - ### sort

    public static <K, V> Map<K,V> sort(Map<K,V> self, Comparator<? super K> comparator)
    Sorts the elements from the given map into a new ordered Map using the specified key comparator to determine the ordering. The original map is unchanged.

        def map = [ba:3, cz:6, ab:5].sort({ a, b -> a[-1] <=> b[-1] } as Comparator)
         assert map*.value == [3, 5, 6]

    Parameters:
      `self` - the original unsorted map
      `comparator` - a Comparator
    Returns:
      the sorted map
    Since:
      1.7.2

  - ### sort

    public static <K, V> Map<K,V> sort(Map<K,V> self)
    Sorts the elements from the given map into a new ordered Map using the natural ordering of the keys to determine the ordering. The original map is unchanged.

        map = [ba:3, cz:6, ab:5].sort()
         assert map*.value == [5, 3, 6]

    Parameters:
      `self` - the original unsorted map
    Returns:
      the sorted map
    Since:
      1.7.2

  - ### sort

    public static <T> T[] sort(T[] self)
    Modifies this array so that its elements are in sorted order. The array items are assumed to be comparable.
    Parameters:
      `self` - the array to be sorted
    Returns:
      the sorted array
    Since:
      1.5.5

  - ### sort

    public static <T> T[] sort(T[] self, boolean mutate)
    Sorts the given array into sorted order. The array items are assumed to be comparable. If mutate is true, the array is sorted in place and returned. Otherwise, a new sorted array is returned and the original array remains unchanged.

         def orig = ["hello","hi","Hey"] as String[]
         def sorted = orig.sort(false)
         assert orig == ["hello","hi","Hey"] as String[]
         assert sorted == ["Hey","hello","hi"] as String[]
         orig.sort(true)
         assert orig == ["Hey","hello","hi"] as String[]

    Parameters:
      `self` - the array to be sorted
      `mutate` - false will always cause a new array to be created, true will mutate the array in place
    Returns:
      the sorted array
    Since:
      1.8.1

  - ### sort

    public static <T> Iterator<T> sort(Iterator<T> self)
    Sorts the given iterator items into a sorted iterator. The items are assumed to be comparable. The original iterator will become exhausted of elements after completing this method call. A new iterator is produced that traverses the items in sorted order.
    Parameters:
      `self` - the Iterator to be sorted
    Returns:
      the sorted items as an Iterator
    Since:
      1.5.5

  - ### sort

    public static <T> Iterator<T> sort(Iterator<T> self, Comparator<? super T> comparator)
    Sorts the given iterator items into a sorted iterator using the comparator. The original iterator will become exhausted of elements after completing this method call. A new iterator is produced that traverses the items in sorted order.
    Parameters:
      `self` - the Iterator to be sorted
      `comparator` - a Comparator used for comparing items
    Returns:
      the sorted items as an Iterator
    Since:
      1.5.5

  - ### sort

    public static <T> List<T> sort(Iterable<T> self, boolean mutate, Comparator<? super T> comparator)
    Sorts the Iterable using the given Comparator. If the Iterable is a List and mutate is true, it is sorted in place and returned. Otherwise, the elements are first placed into a new list which is then sorted and returned - leaving the original Iterable unchanged.

         assert ["hi","hey","hello"] == ["hello","hi","hey"].sort(false, { a, b -> a.length() <=> b.length() } as Comparator )

         def orig = ["hello","hi","Hey"]
         def sorted = orig.sort(false, String.CASE_INSENSITIVE_ORDER)
         assert orig == ["hello","hi","Hey"]
         assert sorted == ["hello","Hey","hi"]

    Parameters:
      `self` - the Iterable to be sorted
      `mutate` - false will always cause a new list to be created, true will mutate lists in place
      `comparator` - a Comparator used for the comparison
    Returns:
      a sorted List
    Since:
      2.2.0

  - ### sort

    public static <T> T[] sort(T[] self, Comparator<? super T> comparator)
    Sorts the given array into sorted order using the given comparator.
    Parameters:
      `self` - the array to be sorted
      `comparator` - a Comparator used for the comparison
    Returns:
      the sorted array
    Since:
      1.5.5

  - ### sort

    public static <T> T[] sort(T[] self, boolean mutate, Comparator<? super T> comparator)
    Modifies this array so that its elements are in sorted order as determined by the given comparator. If mutate is true, the array is sorted in place and returned. Otherwise, a new sorted array is returned and the original array remains unchanged.

         def orig = ["hello","hi","Hey"] as String[]
         def sorted = orig.sort(false, String.CASE_INSENSITIVE_ORDER)
         assert orig == ["hello","hi","Hey"] as String[]
         assert sorted == ["hello","Hey","hi"] as String[]
         orig.sort(true, String.CASE_INSENSITIVE_ORDER)
         assert orig == ["hello","Hey","hi"] as String[]

    Parameters:
      `self` - the array containing elements to be sorted
      `mutate` - false will always cause a new array to be created, true will mutate arrays in place
      `comparator` - a Comparator used for the comparison
    Returns:
      a sorted array
    Since:
      1.8.1

  - ### sort

    public static <T> Iterator<T> sort(Iterator<T> self, Closure closure)
    Sorts the given iterator items into a sorted iterator using the Closure to determine the correct ordering. The original iterator will be fully processed after the method call.

    If the closure has two parameters it is used like a traditional Comparator. I.e. it should compare its two parameters for order, returning a negative integer, zero, or a positive integer when the first parameter is less than, equal to, or greater than the second respectively. Otherwise, the Closure is assumed to take a single parameter and return a Comparable (typically an Integer) which is then used for further comparison.

    Parameters:
      `self` - the Iterator to be sorted
      `closure` - a Closure used to determine the correct ordering
    Returns:
      the sorted items as an Iterator
    Since:
      1.5.5

  - ### sort

    public static <T> T[] sort(T[] self, Closure closure)
    Sorts the elements from this array into a newly created array using the Closure to determine the correct ordering.

    If the closure has two parameters it is used like a traditional Comparator. I.e. it should compare its two parameters for order, returning a negative integer, zero, or a positive integer when the first parameter is less than, equal to, or greater than the second respectively. Otherwise, the Closure is assumed to take a single parameter and return a Comparable (typically an Integer) which is then used for further comparison.

    Parameters:
      `self` - the array containing the elements to be sorted
      `closure` - a Closure used to determine the correct ordering
    Returns:
      the sorted array
    Since:
      1.5.5

  - ### sort

    public static <T> T[] sort(T[] self, boolean mutate, Closure closure)
    Modifies this array so that its elements are in sorted order using the Closure to determine the correct ordering. If mutate is false, a new array is returned and the original array remains unchanged. Otherwise, the original array is sorted in place and returned.

    If the closure has two parameters it is used like a traditional Comparator. I.e. it should compare its two parameters for order, returning a negative integer, zero, or a positive integer when the first parameter is less than, equal to, or greater than the second respectively. Otherwise, the Closure is assumed to take a single parameter and return a Comparable (typically an Integer) which is then used for further comparison.

         def orig = ["hello","hi","Hey"] as String[]
         def sorted = orig.sort(false) { it.size() }
         assert orig == ["hello","hi","Hey"] as String[]
         assert sorted == ["hi","Hey","hello"] as String[]
         orig.sort(true) { it.size() }
         assert orig == ["hi","Hey","hello"] as String[]

    Parameters:
      `self` - the array to be sorted
      `mutate` - false will always cause a new array to be created, true will mutate arrays in place
      `closure` - a Closure used to determine the correct ordering
    Returns:
      the sorted array
    Since:
      1.8.1

  - ### sort

    public static <T> List<T> sort(Iterable<T> self, Closure closure)
    Sorts this Iterable using the given Closure to determine the correct ordering. If the Iterable is a List, it is sorted in place and returned. Otherwise, the elements are first placed into a new list which is then sorted and returned - leaving the original Iterable unchanged.

    If the Closure has two parameters it is used like a traditional Comparator. I.e. it should compare its two parameters for order, returning a negative integer, zero, or a positive integer when the first parameter is less than, equal to, or greater than the second respectively. Otherwise, the Closure is assumed to take a single parameter and return a Comparable (typically an Integer) which is then used for further comparison.

        assert ["hi","hey","hello"] == ["hello","hi","hey"].sort { it.length() }

        assert ["hi","hey","hello"] == ["hello","hi","hey"].sort { a, b -> a.length() <=> b.length() }

    Parameters:
      `self` - the Iterable to be sorted
      `closure` - a 1 or 2 arg Closure used to determine the correct ordering
    Returns:
      a newly created sorted List
    Since:
      2.2.0
    See Also:
      - `sort(Iterable, boolean, Closure)`

  - ### sort

    public static <T> List<T> sort(Iterable<T> self, boolean mutate, Closure closure)
    Sorts this Iterable using the given Closure to determine the correct ordering. If the Iterable is a List and mutate is true, it is sorted in place and returned. Otherwise, the elements are first placed into a new list which is then sorted and returned - leaving the original Iterable unchanged.

    If the closure has two parameters it is used like a traditional Comparator. I.e. it should compare its two parameters for order, returning a negative integer, zero, or a positive integer when the first parameter is less than, equal to, or greater than the second respectively. Otherwise, the Closure is assumed to take a single parameter and return a Comparable (typically an Integer) which is then used for further comparison.

        assert ["hi","hey","hello"] == ["hello","hi","hey"].sort { it.length() }

        assert ["hi","hey","hello"] == ["hello","hi","hey"].sort { a, b -> a.length() <=> b.length() }

         def orig = ["hello","hi","Hey"]
         def sorted = orig.sort(false) { it.toUpperCase() }
         assert orig == ["hello","hi","Hey"]
         assert sorted == ["hello","Hey","hi"]

    Parameters:
      `self` - the Iterable to be sorted
      `mutate` - false will always cause a new list to be created, true will mutate lists in place
      `closure` - a 1 or 2 arg Closure used to determine the correct ordering
    Returns:
      a newly created sorted List
    Since:
      2.2.0

  - ### sort

    public static <T> SortedSet<T> sort(SortedSet<T> self)
    Avoids doing unnecessary work when sorting an already sorted set (i.e. an identity function for an already sorted set).
    Parameters:
      `self` - an already sorted set
    Returns:
      the set
    Since:
      1.0

  - ### sort

    public static <K, V> SortedMap<K,V> sort(SortedMap<K,V> self)
    Avoids doing unnecessary work when sorting an already sorted map (i.e. an identity function for an already sorted map).
    Parameters:
      `self` - an already sorted map
    Returns:
      the map
    Since:
      1.8.1

  - ### toSorted

    public static <T> List<T> toSorted(Iterable<T> self)
    Sorts the Iterable. Assumes that the Iterable elements are comparable and uses a `NumberAwareComparator` to determine the resulting order. `NumberAwareComparator` has special treatment for numbers but otherwise uses the natural ordering of the Iterable elements. The elements are first placed into a new list which is then sorted and returned - leaving the original Iterable unchanged.

         def orig = [1, 3, 2]
         def sorted = orig.toSorted()
         assert orig == [1, 3, 2]
         assert sorted == [1, 2, 3]

    Parameters:
      `self` - the Iterable to be sorted
    Returns:
      the sorted iterable as a List
    Since:
      2.4.0
    See Also:
      - `toSorted(Iterable, Comparator)`

  - ### toSorted

    public static <T> List<T> toSorted(Iterable<T> self, Comparator<? super T> comparator)
    Sorts the Iterable using the given Comparator. The elements are first placed into a new list which is then sorted and returned - leaving the original Iterable unchanged.

         def orig = ["hello","hi","Hey"]
         def sorted = orig.toSorted(String.CASE_INSENSITIVE_ORDER)
         assert orig == ["hello","hi","Hey"]
         assert sorted == ["hello","Hey","hi"]

    Parameters:
      `self` - the Iterable to be sorted
      `comparator` - a Comparator used for the comparison
    Returns:
      a sorted List
    Since:
      2.4.0

  - ### toSorted

    public static <T> List<T> toSorted(Iterable<T> self, Closure closure)
    Sorts this Iterable using the given Closure to determine the correct ordering. The elements are first placed into a new list which is then sorted and returned - leaving the original Iterable unchanged.

    If the Closure has two parameters it is used like a traditional Comparator. I.e. it should compare its two parameters for order, returning a negative integer, zero, or a positive integer when the first parameter is less than, equal to, or greater than the second respectively. Otherwise, the Closure is assumed to take a single parameter and return a Comparable (typically an Integer) which is then used for further comparison.

        assert ["hi","hey","hello"] == ["hello","hi","hey"].sort { it.length() }

        assert ["hi","hey","hello"] == ["hello","hi","hey"].sort { a, b -> a.length() <=> b.length() }

    Parameters:
      `self` - the Iterable to be sorted
      `closure` - a 1 or 2 arg Closure used to determine the correct ordering
    Returns:
      a newly created sorted List
    Since:
      2.4.0
    See Also:
      - `toSorted(Iterable, Comparator)`

  - ### toSorted

    public static <T> Iterator<T> toSorted(Iterator<T> self)
    Sorts the Iterator. Assumes that the Iterator elements are comparable and uses a `NumberAwareComparator` to determine the resulting order. `NumberAwareComparator` has special treatment for numbers but otherwise uses the natural ordering of the Iterator elements. A new iterator is produced that traverses the items in sorted order.
    Parameters:
      `self` - the Iterator to be sorted
    Returns:
      the sorted items as an Iterator
    Since:
      2.4.0
    See Also:
      - `toSorted(Iterator, Comparator)`

  - ### toSorted

    public static <T> Iterator<T> toSorted(Iterator<T> self, Comparator<? super T> comparator)
    Sorts the given iterator items using the comparator. The original iterator will become exhausted of elements after completing this method call. A new iterator is produced that traverses the items in sorted order.
    Parameters:
      `self` - the Iterator to be sorted
      `comparator` - a Comparator used for comparing items
    Returns:
      the sorted items as an Iterator
    Since:
      2.4.0

  - ### toSorted

    public static <T> Iterator<T> toSorted(Iterator<T> self, Closure closure)
    Sorts the given iterator items into a sorted iterator using the Closure to determine the correct ordering. The original iterator will be fully processed after the method call.

    If the closure has two parameters it is used like a traditional Comparator. I.e. it should compare its two parameters for order, returning a negative integer, zero, or a positive integer when the first parameter is less than, equal to, or greater than the second respectively. Otherwise, the Closure is assumed to take a single parameter and return a Comparable (typically an Integer) which is then used for further comparison.

    Parameters:
      `self` - the Iterator to be sorted
      `closure` - a Closure used to determine the correct ordering
    Returns:
      the sorted items as an Iterator
    Since:
      2.4.0
    See Also:
      - `toSorted(Iterator, Comparator)`

  - ### toSorted

    public static <T> T[] toSorted(T[] self)
    Returns a sorted version of the given array using the supplied comparator.
    Parameters:
      `self` - the array to be sorted
    Returns:
      the sorted array
    Since:
      2.4.0
    See Also:
      - `toSorted(Object[], Comparator)`

  - ### toSorted

    public static <T> T[] toSorted(T[] self, Comparator<? super T> comparator)
    Returns a sorted version of the given array using the supplied comparator to determine the resulting order.

         def sumDigitsComparator = [compare: { num1, num2 -> num1.toString().toList()*.toInteger().sum() <=> num2.toString().toList()*.toInteger().sum() }] as Comparator
         Integer[] nums = [9, 44, 222, 7000]
         def result = nums.toSorted(sumDigitsComparator)
         assert result instanceof Integer[]
         assert result == [222, 7000, 44, 9]

    Parameters:
      `self` - the array to be sorted
      `comparator` - a Comparator used for the comparison
    Returns:
      the sorted array
    Since:
      2.4.0

  - ### toSorted

    public static <T> T[] toSorted(T[] self, Closure closure)
    Sorts the elements from this array into a newly created array using the Closure to determine the correct ordering.

    If the closure has two parameters it is used like a traditional Comparator. I.e. it should compare its two parameters for order, returning a negative integer, zero, or a positive integer when the first parameter is less than, equal to, or greater than the second respectively. Otherwise, the Closure is assumed to take a single parameter and return a Comparable (typically an Integer) which is then used for further comparison.

    Parameters:
      `self` - the array containing the elements to be sorted
      `closure` - a Closure used to determine the correct ordering
    Returns:
      a sorted array
    Since:
      2.4.0
    See Also:
      - `toSorted(Object[], Comparator)`

  - ### toSorted

    public static <K, V> Map<K,V> toSorted(Map<K,V> self)
    Sorts the elements from the given map into a new ordered map using a `NumberAwareComparator` on map entry values to determine the resulting order. `NumberAwareComparator` has special treatment for numbers but otherwise uses the natural ordering of the Iterator elements. The original map is unchanged.

         def map = [a:5L, b:3, c:6, d:4.0].toSorted()
         assert map.toString() == '[b:3, d:4.0, a:5, c:6]'

    Parameters:
      `self` - the original unsorted map
    Returns:
      the sorted map
    Since:
      2.4.0

  - ### toSorted

    public static <K, V> Map<K,V> toSorted(Map<K,V> self, Comparator<Map.Entry<K,V>> comparator)
    Sorts the elements from the given map into a new ordered map using the supplied comparator to determine the ordering. The original map is unchanged.

         def keyComparator = [compare: { e1, e2 -> e1.key <=> e2.key }] as Comparator
         def valueComparator = [compare: { e1, e2 -> e1.value <=> e2.value }] as Comparator
         def map1 = [a:5, b:3, d:4, c:6].toSorted(keyComparator)
         assert map1.toString() == '[a:5, b:3, c:6, d:4]'
         def map2 = [a:5, b:3, d:4, c:6].toSorted(valueComparator)
         assert map2.toString() == '[b:3, d:4, a:5, c:6]'

    Parameters:
      `self` - the original unsorted map
      `comparator` - a Comparator used for the comparison
    Returns:
      the sorted map
    Since:
      2.4.0

  - ### toSorted

    public static <K, V> Map<K,V> toSorted(Map<K,V> self, Closure condition)
    Sorts the elements from the given map into a new ordered map using the supplied Closure condition as a comparator to determine the ordering. The original map is unchanged.

    If the closure has two parameters it is used like a traditional Comparator. I.e. it should compare its two entry parameters for order, returning a negative integer, zero, or a positive integer when the first parameter is less than, equal to, or greater than the second respectively. Otherwise, the Closure is assumed to take a single entry parameter and return a Comparable (typically an Integer) which is then used for further comparison.

         def map = [a:5, b:3, c:6, d:4].toSorted { a, b -> a.value <=> b.value }
         assert map.toString() == '[b:3, d:4, a:5, c:6]'

    Parameters:
      `self` - the original unsorted map
      `condition` - a Closure used as a comparator
    Returns:
      the sorted map
    Since:
      2.4.0

  - ### toSorted

    public static <T> Set<T> toSorted(SortedSet<T> self)
    Avoids doing unnecessary work when sorting an already sorted set
    Parameters:
      `self` - an already sorted set
    Returns:
      an ordered copy of the sorted set
    Since:
      2.4.0

  - ### toSorted

    public static <K, V> Map<K,V> toSorted(SortedMap<K,V> self)
    Avoids doing unnecessary work when sorting an already sorted map
    Parameters:
      `self` - an already sorted map
    Returns:
      an ordered copy of the map
    Since:
      2.4.0

  - ### pop

    public static <T> T pop(List<T> self)
    Removes the initial item from the List.

         def list = ["a", false, 2]
         assert list.pop() == 'a'
         assert list == [false, 2]

    This is similar to pop on a Stack where the first item in the list represents the top of the stack. Note: The behavior of this method changed in Groovy 2.5 to align with Java. If you need the old behavior use 'removeLast'.
    Parameters:
      `self` - a List
    Returns:
      the item removed from the List
    Throws:
      `NoSuchElementException` - if the list is empty
    Since:
      1.0

  - ### removeLast

    public static <T> T removeLast(List<T> self)
    Removes the last item from the List.

         def list = ["a", false, 2]
         assert list.removeLast() == 2
         assert list == ["a", false]

    Using add() and removeLast() is similar to push and pop on a Stack where the last item in the list represents the top of the stack.
    Parameters:
      `self` - a List
    Returns:
      the item removed from the List
    Throws:
      `NoSuchElementException` - if the list is empty
    Since:
      2.5.0

  - ### putAll

    public static <K, V> Map<K,V> putAll(Map<K,V> self, Collection<? extends Map.Entry<? extends K,? extends V>> entries)
    Provides an easy way to append multiple Map.Entry values to a Map.
    Parameters:
      `self` - a Map
      `entries` - a Collection of Map.Entry items to be added to the Map.
    Returns:
      the same map, after the items have been added to it.
    Since:
      1.6.1

  - ### plus

    public static <K, V> Map<K,V> plus(Map<K,V> self, Collection<? extends Map.Entry<? extends K,? extends V>> entries)
    Returns a new `Map` containing all entries from `self` and `entries`, giving precedence to `entries`. Any keys appearing in both Maps will appear in the resultant map with values from the `entries` operand. If `self` map is one of TreeMap, LinkedHashMap, Hashtable or Properties, the returned Map will preserve that type, otherwise a HashMap will be returned.
    Parameters:
      `self` - a Map
      `entries` - a Collection of Map.Entry items to be added to the Map.
    Returns:
      a new Map containing all key, value pairs from self and entries
    Since:
      1.6.1

  - ### push

    public static <T> boolean push(List<T> self, T value)
    Prepends an item to the start of the List.

         def list = [3, 4, 2]
         list.push("x")
         assert list == ['x', 3, 4, 2]

    This is similar to push on a Stack where the first item in the list represents the top of the stack. Note: The behavior of this method changed in Groovy 2.5 to align with Java. If you need the old behavior use 'add'.
    Parameters:
      `self` - a List
      `value` - element to be prepended to this list.
    Returns:
      `true` (for legacy compatibility reasons).
    Since:
      1.5.5

  - ### last

    public static <T> T last(Deque<T> self)
    An optimized version of `last(List)`.
    Since:
      2.5.15

  - ### last

    public static <T> T last(List<T> self)
    Returns the last item from the List.

         def list = [3, 4, 2]
         assert list.last() == 2
         // check original is unaltered
         assert list == [3, 4, 2]

    Parameters:
      `self` - a List
    Returns:
      the last item from the List
    Throws:
      `NoSuchElementException` - if the list is empty and you try to access the last() item.
    Since:
      1.5.5

  - ### last

    public static <T> T last(Iterable<T> self)
    Returns the last item from the Iterable.

         def set = [3, 4, 2] as LinkedHashSet
         assert set.last() == 2
         // check original unaltered
         assert set == [3, 4, 2] as Set

    The last element returned by the Iterable's iterator is returned. If the Iterable doesn't guarantee a defined order it may appear like a random element is returned.
    Parameters:
      `self` - an Iterable
    Returns:
      the last item from the Iterable
    Throws:
      `NoSuchElementException` - if the Iterable is empty and you try to access the last() item.
    Since:
      1.8.7

  - ### last

    public static <T> T last(T[] self)
    Returns the last item from the array.

         def array = [3, 4, 2].toArray()
         assert array.last() == 2

    Parameters:
      `self` - an array
    Returns:
      the last item from the array
    Throws:
      `NoSuchElementException` - if the array is empty and you try to access the last() item.
    Since:
      1.7.3

  - ### first

    public static <T> T first(List<T> self)
    Returns the first item from the List.

         def list = [3, 4, 2]
         assert list.first() == 3
         // check original is unaltered
         assert list == [3, 4, 2]

    Parameters:
      `self` - a List
    Returns:
      the first item from the List
    Throws:
      `NoSuchElementException` - if the list is empty and you try to access the first() item.
    Since:
      1.5.5

  - ### first

    public static <T> T first(Iterable<T> self)
    Returns the first item from the Iterable.

         def set = [3, 4, 2] as LinkedHashSet
         assert set.first() == 3
         // check original is unaltered
         assert set == [3, 4, 2] as Set

    The first element returned by the Iterable's iterator is returned. If the Iterable doesn't guarantee a defined order it may appear like a random element is returned.
    Parameters:
      `self` - an Iterable
    Returns:
      the first item from the Iterable
    Throws:
      `NoSuchElementException` - if the Iterable is empty and you try to access the first() item.
    Since:
      1.8.7

  - ### first

    public static <T> T first(T[] self)
    Returns the first item from the array.

         def array = [3, 4, 2].toArray()
         assert array.first() == 3

    Parameters:
      `self` - an array
    Returns:
      the first item from the array
    Throws:
      `NoSuchElementException` - if the array is empty and you try to access the first() item.
    Since:
      1.7.3

  - ### head

    public static <T> T head(Iterable<T> self)
    Returns the first item from the Iterable.

         def set = [3, 4, 2] as LinkedHashSet
         assert set.head() == 3
         // check original is unaltered
         assert set == [3, 4, 2] as Set

    The first element returned by the Iterable's iterator is returned. If the Iterable doesn't guarantee a defined order it may appear like a random element is returned.
    Parameters:
      `self` - an Iterable
    Returns:
      the first item from the Iterable
    Throws:
      `NoSuchElementException` - if the Iterable is empty and you try to access the head() item.
    Since:
      2.4.0

  - ### head

    public static <T> T head(List<T> self)
    Returns the first item from the List.

        def list = [3, 4, 2]
         assert list.head() == 3
         assert list == [3, 4, 2]

    Parameters:
      `self` - a List
    Returns:
      the first item from the List
    Throws:
      `NoSuchElementException` - if the list is empty and you try to access the head() item.
    Since:
      1.5.5

  - ### head

    public static <T> T head(T[] self)
    Returns the first item from the Object array.

        def array = [3, 4, 2].toArray()
         assert array.head() == 3

    Parameters:
      `self` - an array
    Returns:
      the first item from the Object array
    Throws:
      `NoSuchElementException` - if the array is empty and you try to access the head() item.
    Since:
      1.7.3

  - ### tail

    public static <T> List<T> tail(List<T> self)
    Returns the items from the List excluding the first item.

         def list = [3, 4, 2]
         assert list.tail() == [4, 2]
         assert list == [3, 4, 2]

    Parameters:
      `self` - a List
    Returns:
      a List without its first element
    Throws:
      `NoSuchElementException` - if the List is empty and you try to access the tail()
    Since:
      1.5.6

  - ### tail

    public static <T> SortedSet<T> tail(SortedSet<T> self)
    Returns the items from the SortedSet excluding the first item.

         def sortedSet = [3, 4, 2] as SortedSet
         assert sortedSet.tail() == [3, 4] as SortedSet
         assert sortedSet == [3, 4, 2] as SortedSet

    Parameters:
      `self` - a SortedSet
    Returns:
      a SortedSet without its first element
    Throws:
      `NoSuchElementException` - if the SortedSet is empty and you try to access the tail()
    Since:
      2.4.0

  - ### tails

    public static <T> List<List<T>> tails(Iterable<T> self)
    Calculates the tail values of this Iterable: the first value will be this list of all items from the iterable and the final one will be an empty list, with the intervening values the results of successive applications of tail on the items.

         assert [1, 2, 3, 4].tails() == [[1, 2, 3, 4], [2, 3, 4], [3, 4], [4], []]

    Parameters:
      `self` - an Iterable
    Returns:
      a List of the tail values from the given Iterable
    Since:
      2.5.0

  - ### tail

    public static <T> Collection<T> tail(Iterable<T> self)
    Returns the items from the Iterable excluding the first item.

         def list = [3, 4, 2]
         assert list.tail() == [4, 2]
         assert list == [3, 4, 2]

    Parameters:
      `self` - an Iterable
    Returns:
      a collection without its first element
    Throws:
      `NoSuchElementException` - if the iterable is empty and you try to access the tail()
    Since:
      2.4.0

  - ### tail

    public static <T> T[] tail(T[] self)
    Returns the items from the array excluding the first item.

         String[] strings = ["a", "b", "c"]
         def result = strings.tail()
         assert result.class.componentType == String
         String[] expected = ["b", "c"]
         assert result == expected

    Parameters:
      `self` - an array
    Returns:
      an array without its first element
    Throws:
      `NoSuchElementException` - if the array is empty and you try to access the tail()
    Since:
      1.7.3

  - ### tail

    public static <T> Iterator<T> tail(Iterator<T> self)
    Returns the original iterator after throwing away the first element.
    Parameters:
      `self` - the original iterator
    Returns:
      the iterator without its first element
    Throws:
      `NoSuchElementException` - if the array is empty and you try to access the tail()
    Since:
      1.8.1

  - ### inits

    public static <T> List<List<T>> inits(Iterable<T> self)
    Calculates the init values of this Iterable: the first value will be this list of all items from the iterable and the final one will be an empty list, with the intervening values the results of successive applications of init on the items.

         assert [1, 2, 3, 4].inits() == [[1, 2, 3, 4], [1, 2, 3], [1, 2], [1], []]

    Parameters:
      `self` - an Iterable
    Returns:
      a List of the init values from the given Iterable
    Since:
      2.5.0

  - ### init

    public static <T> Collection<T> init(Iterable<T> self)
    Returns the items from the Iterable excluding the last item. Leaves the original Iterable unchanged.

         def list = [3, 4, 2]
         assert list.init() == [3, 4]
         assert list == [3, 4, 2]

    Parameters:
      `self` - an Iterable
    Returns:
      a Collection without its last element
    Throws:
      `NoSuchElementException` - if the iterable is empty and you try to access init()
    Since:
      2.4.0

  - ### init

    public static <T> List<T> init(List<T> self)
    Returns the items from the List excluding the last item. Leaves the original List unchanged.

         def list = [3, 4, 2]
         assert list.init() == [3, 4]
         assert list == [3, 4, 2]

    Parameters:
      `self` - a List
    Returns:
      a List without its last element
    Throws:
      `NoSuchElementException` - if the List is empty and you try to access init()
    Since:
      2.4.0

  - ### init

    public static <T> SortedSet<T> init(SortedSet<T> self)
    Returns the items from the SortedSet excluding the last item. Leaves the original SortedSet unchanged.

         def sortedSet = [3, 4, 2] as SortedSet
         assert sortedSet.init() == [2, 3] as SortedSet
         assert sortedSet == [3, 4, 2] as SortedSet

    Parameters:
      `self` - a SortedSet
    Returns:
      a SortedSet without its last element
    Throws:
      `NoSuchElementException` - if the SortedSet is empty and you try to access init()
    Since:
      2.4.0

  - ### init

    public static <T> Iterator<T> init(Iterator<T> self)
    Returns an Iterator containing all the items from this iterator except the last one.

         def iter = [3, 4, 2].listIterator()
         def result = iter.init()
         assert result.toList() == [3, 4]

    Parameters:
      `self` - an Iterator
    Returns:
      an Iterator without the last element from the original Iterator
    Throws:
      `NoSuchElementException` - if the iterator is empty and you try to access init()
    Since:
      2.4.0

  - ### init

    public static <T> T[] init(T[] self)
    Returns the items from the Object array excluding the last item.

             String[] strings = ["a", "b", "c"]
             def result = strings.init()
             assert result.length == 2
             assert strings.class.componentType == String

    Parameters:
      `self` - an array
    Returns:
      an array without its last element
    Throws:
      `NoSuchElementException` - if the array is empty and you try to access the init() item.
    Since:
      2.4.0

  - ### take

    public static <T> List<T> take(List<T> self, int num)
    Returns the first `num` elements from the head of this List.

         def strings = [ 'a', 'b', 'c' ]
         assert strings.take( 0 ) == []
         assert strings.take( 2 ) == [ 'a', 'b' ]
         assert strings.take( 5 ) == [ 'a', 'b', 'c' ]

    Parameters:
      `self` - the original List
      `num` - the number of elements to take from this List
    Returns:
      a List consisting of the first `num` elements from this List, or else all the elements from the List if it has less than `num` elements.
    Since:
      1.8.1

  - ### take

    public static <T> SortedSet<T> take(SortedSet<T> self, int num)
    Returns the first `num` elements from the head of this SortedSet.

         def strings = [ 'a', 'b', 'c' ] as SortedSet
         assert strings.take( 0 ) == [] as SortedSet
         assert strings.take( 2 ) == [ 'a', 'b' ] as SortedSet
         assert strings.take( 5 ) == [ 'a', 'b', 'c' ] as SortedSet

    Parameters:
      `self` - the original SortedSet
      `num` - the number of elements to take from this SortedSet
    Returns:
      a SortedSet consisting of the first `num` elements from this List, or else all the elements from the SortedSet if it has less than `num` elements.
    Since:
      2.4.0

  - ### take

    public static <T> T[] take(T[] self, int num)
    Returns the first `num` elements from the head of this array.

         String[] strings = [ 'a', 'b', 'c' ]
         assert strings.take( 0 ) == [] as String[]
         assert strings.take( 2 ) == [ 'a', 'b' ] as String[]
         assert strings.take( 5 ) == [ 'a', 'b', 'c' ] as String[]

    Parameters:
      `self` - the original array
      `num` - the number of elements to take from this array
    Returns:
      an array consisting of the first `num` elements of this array, or else the whole array if it has less than `num` elements.
    Since:
      1.8.1

  - ### take

    public static <T> Collection<T> take(Iterable<T> self, int num)
    Returns the first `num` elements from the head of this Iterable.

         def strings = [ 'a', 'b', 'c' ]
         assert strings.take( 0 ) == []
         assert strings.take( 2 ) == [ 'a', 'b' ]
         assert strings.take( 5 ) == [ 'a', 'b', 'c' ]

         class AbcIterable implements Iterable {
             Iterator iterator() { "abc".iterator() }
         }
         def abc = new AbcIterable()
         assert abc.take(0) == []
         assert abc.take(1) == ['a']
         assert abc.take(3) == ['a', 'b', 'c']
         assert abc.take(5) == ['a', 'b', 'c']

    Parameters:
      `self` - the original Iterable
      `num` - the number of elements to take from this Iterable
    Returns:
      a Collection consisting of the first `num` elements from this Iterable, or else all the elements from the Iterable if it has less than `num` elements.
    Since:
      1.8.7

  - ### addAll

    public static <T> boolean addAll(Collection<T> self, Iterator<? extends T> items)
    Adds all items from the iterator to the Collection.
    Parameters:
      `self` - the collection
      `items` - the items to add
    Returns:
      true if the collection changed

  - ### addAll

    public static <T> boolean addAll(Collection<T> self, Iterable<? extends T> items)
    Adds all items from the iterable to the Collection.
    Parameters:
      `self` - the collection
      `items` - the items to add
    Returns:
      true if the collection changed

  - ### take

    public static <K, V> Map<K,V> take(Map<K,V> self, int num)
    Returns a new map containing the first `num` elements from the head of this map. If the map instance does not have ordered keys, then this function could return a random `num` entries. Groovy by default uses LinkedHashMap, so this shouldn't be an issue in the main.

         def strings = [ 'a':10, 'b':20, 'c':30 ]
         assert strings.take( 0 ) == [:]
         assert strings.take( 2 ) == [ 'a':10, 'b':20 ]
         assert strings.take( 5 ) == [ 'a':10, 'b':20, 'c':30 ]

    Parameters:
      `self` - the original map
      `num` - the number of elements to take from this map
    Returns:
      a new map consisting of the first `num` elements of this map, or else the whole map if it has less than `num` elements.
    Since:
      1.8.1

  - ### take

    public static <T> Iterator<T> take(Iterator<T> self, int num)
    Returns an iterator of up to the first `num` elements from this iterator. The original iterator is stepped along by `num` elements.

         def a = 0
         def iter = [ hasNext:{ true }, next:{ a++ } ] as Iterator
         def iteratorCompare( Iterator a, List b ) {
             a.collect { it } == b
         }
         assert iteratorCompare( iter.take( 0 ), [] )
         assert iteratorCompare( iter.take( 2 ), [ 0, 1 ] )
         assert iteratorCompare( iter.take( 5 ), [ 2, 3, 4, 5, 6 ] )

    Parameters:
      `self` - the Iterator
      `num` - the number of elements to take from this iterator
    Returns:
      an iterator consisting of up to the first `num` elements of this iterator.
    Since:
      1.8.1

  - ### takeRight

    public static <T> T[] takeRight(T[] self, int num)
    Returns the last `num` elements from the tail of this array.

         String[] strings = [ 'a', 'b', 'c' ]
         assert strings.takeRight( 0 ) == [] as String[]
         assert strings.takeRight( 2 ) == [ 'b', 'c' ] as String[]
         assert strings.takeRight( 5 ) == [ 'a', 'b', 'c' ] as String[]

    Parameters:
      `self` - the original array
      `num` - the number of elements to take from this array
    Returns:
      an array consisting of the last `num` elements of this array, or else the whole array if it has less than `num` elements.
    Since:
      2.4.0

  - ### takeRight

    public static <T> Collection<T> takeRight(Iterable<T> self, int num)
    Returns the last `num` elements from the tail of this Iterable.

         def strings = [ 'a', 'b', 'c' ]
         assert strings.takeRight( 0 ) == []
         assert strings.takeRight( 2 ) == [ 'b', 'c' ]
         assert strings.takeRight( 5 ) == [ 'a', 'b', 'c' ]

         class AbcIterable implements Iterable {
             Iterator iterator() { "abc".iterator() }
         }
         def abc = new AbcIterable()
         assert abc.takeRight(0) == []
         assert abc.takeRight(1) == ['c']
         assert abc.takeRight(3) == ['a', 'b', 'c']
         assert abc.takeRight(5) == ['a', 'b', 'c']

    Parameters:
      `self` - the original Iterable
      `num` - the number of elements to take from this Iterable
    Returns:
      a Collection consisting of the last `num` elements from this Iterable, or else all the elements from the Iterable if it has less than `num` elements.
    Since:
      2.4.0

  - ### takeRight

    public static <T> List<T> takeRight(List<T> self, int num)
    Returns the last `num` elements from the tail of this List.

         def strings = [ 'a', 'b', 'c' ]
         assert strings.takeRight( 0 ) == []
         assert strings.takeRight( 2 ) == [ 'b', 'c' ]
         assert strings.takeRight( 5 ) == [ 'a', 'b', 'c' ]

    Parameters:
      `self` - the original List
      `num` - the number of elements to take from this List
    Returns:
      a List consisting of the last `num` elements from this List, or else all the elements from the List if it has less than `num` elements.
    Since:
      2.4.0

  - ### takeRight

    public static <T> SortedSet<T> takeRight(SortedSet<T> self, int num)
    Returns the last `num` elements from the tail of this SortedSet.

         def strings = [ 'a', 'b', 'c' ] as SortedSet
         assert strings.takeRight( 0 ) == [] as SortedSet
         assert strings.takeRight( 2 ) == [ 'b', 'c' ] as SortedSet
         assert strings.takeRight( 5 ) == [ 'a', 'b', 'c' ] as SortedSet

    Parameters:
      `self` - the original SortedSet
      `num` - the number of elements to take from this SortedSet
    Returns:
      a SortedSet consisting of the last `num` elements from this SortedSet, or else all the elements from the SortedSet if it has less than `num` elements.
    Since:
      2.4.0

  - ### drop

    public static <T> SortedSet<T> drop(SortedSet<T> self, int num)
    Drops the given number of elements from the head of this List.

         def strings = [ 'a', 'b', 'c' ] as SortedSet
         assert strings.drop( 0 ) == [ 'a', 'b', 'c' ] as SortedSet
         assert strings.drop( 2 ) == [ 'c' ] as SortedSet
         assert strings.drop( 5 ) == [] as SortedSet

    Parameters:
      `self` - the original SortedSet
      `num` - the number of elements to drop from this Iterable
    Returns:
      a SortedSet consisting of all the elements of this Iterable minus the first `num` elements, or an empty list if it has less than `num` elements.
    Since:
      2.4.0

  - ### drop

    public static <T> List<T> drop(List<T> self, int num)
    Drops the given number of elements from the head of this List.

         def strings = [ 'a', 'b', 'c' ]
         assert strings.drop( 0 ) == [ 'a', 'b', 'c' ]
         assert strings.drop( 2 ) == [ 'c' ]
         assert strings.drop( 5 ) == []

    Parameters:
      `self` - the original List
      `num` - the number of elements to drop from this Iterable
    Returns:
      a List consisting of all the elements of this Iterable minus the first `num` elements, or an empty list if it has less than `num` elements.
    Since:
      1.8.1

  - ### drop

    public static <T> Collection<T> drop(Iterable<T> self, int num)
    Drops the given number of elements from the head of this Iterable.

         def strings = [ 'a', 'b', 'c' ]
         assert strings.drop( 0 ) == [ 'a', 'b', 'c' ]
         assert strings.drop( 2 ) == [ 'c' ]
         assert strings.drop( 5 ) == []

         class AbcIterable implements Iterable {
             Iterator iterator() { "abc".iterator() }
         }
         def abc = new AbcIterable()
         assert abc.drop(0) == ['a', 'b', 'c']
         assert abc.drop(1) == ['b', 'c']
         assert abc.drop(3) == []
         assert abc.drop(5) == []

    Parameters:
      `self` - the original Iterable
      `num` - the number of elements to drop from this Iterable
    Returns:
      a Collection consisting of all the elements of this Iterable minus the first `num` elements, or an empty list if it has less than `num` elements.
    Since:
      1.8.7

  - ### drop

    public static <T> T[] drop(T[] self, int num)
    Drops the given number of elements from the head of this array if they are available.

         String[] strings = [ 'a', 'b', 'c' ]
         assert strings.drop( 0 ) == [ 'a', 'b', 'c' ] as String[]
         assert strings.drop( 2 ) == [ 'c' ] as String[]
         assert strings.drop( 5 ) == [] as String[]

    Parameters:
      `self` - the original array
      `num` - the number of elements to drop from this array
    Returns:
      an array consisting of all elements of this array except the first `num` ones, or else the empty array, if this array has less than `num` elements.
    Since:
      1.8.1

  - ### drop

    public static <K, V> Map<K,V> drop(Map<K,V> self, int num)
    Drops the given number of key/value pairs from the head of this map if they are available.

         def strings = [ 'a':10, 'b':20, 'c':30 ]
         assert strings.drop( 0 ) == [ 'a':10, 'b':20, 'c':30 ]
         assert strings.drop( 2 ) == [ 'c':30 ]
         assert strings.drop( 5 ) == [:]

    If the map instance does not have ordered keys, then this function could drop a random `num` entries. Groovy by default uses LinkedHashMap, so this shouldn't be an issue in the main.
    Parameters:
      `self` - the original map
      `num` - the number of elements to drop from this map
    Returns:
      a map consisting of all key/value pairs of this map except the first `num` ones, or else the empty map, if this map has less than `num` elements.
    Since:
      1.8.1

  - ### drop

    public static <T> Iterator<T> drop(Iterator<T> self, int num)
    Drops the given number of elements from the head of this iterator if they are available. The original iterator is stepped along by `num` elements.

         def iteratorCompare( Iterator a, List b ) {
             a.collect { it } == b
         }
         def iter = [ 1, 2, 3, 4, 5 ].listIterator()
         assert iteratorCompare( iter.drop( 0 ), [ 1, 2, 3, 4, 5 ] )
         iter = [ 1, 2, 3, 4, 5 ].listIterator()
         assert iteratorCompare( iter.drop( 2 ), [ 3, 4, 5 ] )
         iter = [ 1, 2, 3, 4, 5 ].listIterator()
         assert iteratorCompare( iter.drop( 5 ), [] )

    Parameters:
      `self` - the original iterator
      `num` - the number of elements to drop from this iterator
    Returns:
      The iterator stepped along by `num` elements if they exist.
    Since:
      1.8.1

  - ### dropRight

    public static <T> SortedSet<T> dropRight(SortedSet<T> self, int num)
    Drops the given number of elements from the tail of this SortedSet.

         def strings = [ 'a', 'b', 'c' ] as SortedSet
         assert strings.dropRight( 0 ) == [ 'a', 'b', 'c' ] as SortedSet
         assert strings.dropRight( 2 ) == [ 'a' ] as SortedSet
         assert strings.dropRight( 5 ) == [] as SortedSet

    Parameters:
      `self` - the original SortedSet
      `num` - the number of elements to drop from this SortedSet
    Returns:
      a List consisting of all the elements of this SortedSet minus the last `num` elements, or an empty SortedSet if it has less than `num` elements.
    Since:
      2.4.0

  - ### dropRight

    public static <T> List<T> dropRight(List<T> self, int num)
    Drops the given number of elements from the tail of this List.

         def strings = [ 'a', 'b', 'c' ]
         assert strings.dropRight( 0 ) == [ 'a', 'b', 'c' ]
         assert strings.dropRight( 2 ) == [ 'a' ]
         assert strings.dropRight( 5 ) == []

    Parameters:
      `self` - the original List
      `num` - the number of elements to drop from this List
    Returns:
      a List consisting of all the elements of this List minus the last `num` elements, or an empty List if it has less than `num` elements.
    Since:
      2.4.0

  - ### dropRight

    public static <T> Collection<T> dropRight(Iterable<T> self, int num)
    Drops the given number of elements from the tail of this Iterable.

         def strings = [ 'a', 'b', 'c' ]
         assert strings.dropRight( 0 ) == [ 'a', 'b', 'c' ]
         assert strings.dropRight( 2 ) == [ 'a' ]
         assert strings.dropRight( 5 ) == []

         class AbcIterable implements Iterable {
             Iterator iterator() { "abc".iterator() }
         }
         def abc = new AbcIterable()
         assert abc.dropRight(0) == ['a', 'b', 'c']
         assert abc.dropRight(1) == ['a', 'b']
         assert abc.dropRight(3) == []
         assert abc.dropRight(5) == []

    Parameters:
      `self` - the original Iterable
      `num` - the number of elements to drop from this Iterable
    Returns:
      a Collection consisting of all the elements of this Iterable minus the last `num` elements, or an empty list if it has less than `num` elements.
    Since:
      2.4.0

  - ### dropRight

    public static <T> Iterator<T> dropRight(Iterator<T> self, int num)
    Drops the given number of elements from the tail of this Iterator.

         def getObliterator() { "obliter8".iterator() }
         assert obliterator.dropRight(-1).toList() == ['o', 'b', 'l', 'i', 't', 'e', 'r', '8']
         assert obliterator.dropRight(0).toList() == ['o', 'b', 'l', 'i', 't', 'e', 'r', '8']
         assert obliterator.dropRight(1).toList() == ['o', 'b', 'l', 'i', 't', 'e', 'r']
         assert obliterator.dropRight(4).toList() == ['o', 'b', 'l', 'i']
         assert obliterator.dropRight(7).toList() == ['o']
         assert obliterator.dropRight(8).toList() == []
         assert obliterator.dropRight(9).toList() == []

    Parameters:
      `self` - the original Iterator
      `num` - the number of elements to drop
    Returns:
      an Iterator consisting of all the elements of this Iterator minus the last `num` elements, or an empty Iterator if it has less than `num` elements.
    Since:
      2.4.0

  - ### dropRight

    public static <T> T[] dropRight(T[] self, int num)
    Drops the given number of elements from the tail of this array if they are available.

         String[] strings = [ 'a', 'b', 'c' ]
         assert strings.dropRight( 0 ) == [ 'a', 'b', 'c' ] as String[]
         assert strings.dropRight( 2 ) == [ 'a' ] as String[]
         assert strings.dropRight( 5 ) == [] as String[]

    Parameters:
      `self` - the original array
      `num` - the number of elements to drop from this array
    Returns:
      an array consisting of all elements of this array except the last `num` ones, or else the empty array, if this array has less than `num` elements.
    Since:
      2.4.0

  - ### takeWhile

    public static <T> List<T> takeWhile(List<T> self, Closure condition)
    Returns the longest prefix of this list where each element passed to the given closure condition evaluates to true. Similar to `takeWhile(Iterable, groovy.lang.Closure)` except that it attempts to preserve the type of the original list.

         def nums = [ 1, 3, 2 ]
         assert nums.takeWhile{ it < 1 } == []
         assert nums.takeWhile{ it < 3 } == [ 1 ]
         assert nums.takeWhile{ it < 4 } == [ 1, 3, 2 ]

    Parameters:
      `self` - the original list
      `condition` - the closure that must evaluate to true to continue taking elements
    Returns:
      a prefix of the given list where each element passed to the given closure evaluates to true
    Since:
      1.8.7

  - ### takeWhile

    public static <T> Collection<T> takeWhile(Iterable<T> self, Closure condition)
    Returns a Collection containing the longest prefix of the elements from this Iterable where each element passed to the given closure evaluates to true.

         class AbcIterable implements Iterable {
             Iterator iterator() { "abc".iterator() }
         }
         def abc = new AbcIterable()
         assert abc.takeWhile{ it < 'b' } == ['a']
         assert abc.takeWhile{ it <= 'b' } == ['a', 'b']

    Parameters:
      `self` - an Iterable
      `condition` - the closure that must evaluate to true to continue taking elements
    Returns:
      a Collection containing a prefix of the elements from the given Iterable where each element passed to the given closure evaluates to true
    Since:
      1.8.7

  - ### takeWhile

    public static <T> SortedSet<T> takeWhile(SortedSet<T> self, Closure condition)
    Returns the longest prefix of this SortedSet where each element passed to the given closure condition evaluates to true. Similar to `takeWhile(Iterable, groovy.lang.Closure)` except that it attempts to preserve the type of the original SortedSet.

         def nums = [ 1, 2, 3 ] as SortedSet
         assert nums.takeWhile{ it < 1 } == [] as SortedSet
         assert nums.takeWhile{ it < 2 } == [ 1 ] as SortedSet
         assert nums.takeWhile{ it < 4 } == [ 1, 2, 3 ] as SortedSet

    Parameters:
      `self` - the original SortedSet
      `condition` - the closure that must evaluate to true to continue taking elements
    Returns:
      a prefix of the given SortedSet where each element passed to the given closure evaluates to true
    Since:
      2.4.0

  - ### takeWhile

    public static <K, V> Map<K,V> takeWhile(Map<K,V> self, Closure condition)
    Returns the longest prefix of this Map where each entry (or key/value pair) when passed to the given closure evaluates to true.

         def shopping = [milk:1, bread:2, chocolate:3]
         assert shopping.takeWhile{ it.key.size() < 6 } == [milk:1, bread:2]
         assert shopping.takeWhile{ it.value % 2 } == [milk:1]
         assert shopping.takeWhile{ k, v -> k.size() + v <= 7 } == [milk:1, bread:2]

    If the map instance does not have ordered keys, then this function could appear to take random entries. Groovy by default uses LinkedHashMap, so this shouldn't be an issue in the main.
    Parameters:
      `self` - a Map
      `condition` - a 1 (or 2) arg Closure that must evaluate to true for the entry (or key and value) to continue taking elements
    Returns:
      a prefix of the given Map where each entry (or key/value pair) passed to the given closure evaluates to true
    Since:
      1.8.7

  - ### takeWhile

    public static <T> T[] takeWhile(T[] self, Closure condition)
    Returns the longest prefix of this array where each element passed to the given closure evaluates to true.

         def nums = [ 1, 3, 2 ] as Integer[]
         assert nums.takeWhile{ it < 1 } == [] as Integer[]
         assert nums.takeWhile{ it < 3 } == [ 1 ] as Integer[]
         assert nums.takeWhile{ it < 4 } == [ 1, 3, 2 ] as Integer[]

    Parameters:
      `self` - the original array
      `condition` - the closure that must evaluate to true to continue taking elements
    Returns:
      a prefix of the given array where each element passed to the given closure evaluates to true
    Since:
      1.8.7

  - ### takeWhile

    public static <T> Iterator<T> takeWhile(Iterator<T> self, Closure condition)
    Returns the longest prefix of elements in this iterator where each element passed to the given condition closure evaluates to true.

         def a = 0
         def iter = [ hasNext:{ true }, next:{ a++ } ] as Iterator

         assert [].iterator().takeWhile{ it < 3 }.toList() == []
         assert [1, 2, 3, 4, 5].iterator().takeWhile{ it < 3 }.toList() == [ 1, 2 ]
         assert iter.takeWhile{ it < 5 }.toList() == [ 0, 1, 2, 3, 4 ]

    Parameters:
      `self` - the Iterator
      `condition` - the closure that must evaluate to true to continue taking elements
    Returns:
      a prefix of elements in the given iterator where each element passed to the given closure evaluates to true
    Since:
      1.8.7

  - ### dropWhile

    public static <T> SortedSet<T> dropWhile(SortedSet<T> self, Closure condition)
    Returns a suffix of this SortedSet where elements are dropped from the front while the given Closure evaluates to true. Similar to `dropWhile(Iterable, groovy.lang.Closure)` except that it attempts to preserve the type of the original SortedSet.

         def nums = [ 1, 2, 3 ] as SortedSet
         assert nums.dropWhile{ it < 4 } == [] as SortedSet
         assert nums.dropWhile{ it < 2 } == [ 2, 3 ] as SortedSet
         assert nums.dropWhile{ it != 3 } == [ 3 ] as SortedSet
         assert nums.dropWhile{ it == 0 } == [ 1, 2, 3 ] as SortedSet

    Parameters:
      `self` - the original SortedSet
      `condition` - the closure that must evaluate to true to continue dropping elements
    Returns:
      the shortest suffix of the given SortedSet such that the given closure condition evaluates to true for each element dropped from the front of the SortedSet
    Since:
      2.4.0

  - ### dropWhile

    public static <T> List<T> dropWhile(List<T> self, Closure condition)
    Returns a suffix of this List where elements are dropped from the front while the given Closure evaluates to true. Similar to `dropWhile(Iterable, groovy.lang.Closure)` except that it attempts to preserve the type of the original list.

         def nums = [ 1, 3, 2 ]
         assert nums.dropWhile{ it < 4 } == []
         assert nums.dropWhile{ it < 3 } == [ 3, 2 ]
         assert nums.dropWhile{ it != 2 } == [ 2 ]
         assert nums.dropWhile{ it == 0 } == [ 1, 3, 2 ]

    Parameters:
      `self` - the original list
      `condition` - the closure that must evaluate to true to continue dropping elements
    Returns:
      the shortest suffix of the given List such that the given closure condition evaluates to true for each element dropped from the front of the List
    Since:
      1.8.7

  - ### dropWhile

    public static <T> Collection<T> dropWhile(Iterable<T> self, Closure condition)
    Returns a suffix of this Iterable where elements are dropped from the front while the given closure evaluates to true.

         class HorseIterable implements Iterable {
             Iterator iterator() { "horse".iterator() }
         }
         def horse = new HorseIterable()
         assert horse.dropWhile{ it < 'r' } == ['r', 's', 'e']
         assert horse.dropWhile{ it <= 'r' } == ['s', 'e']

    Parameters:
      `self` - an Iterable
      `condition` - the closure that must evaluate to true to continue dropping elements
    Returns:
      a Collection containing the shortest suffix of the given Iterable such that the given closure condition evaluates to true for each element dropped from the front of the Iterable
    Since:
      1.8.7

  - ### dropWhile

    public static <K, V> Map<K,V> dropWhile(Map<K,V> self, Closure condition)
    Create a suffix of the given Map by dropping as many entries as possible from the front of the original Map such that calling the given closure condition evaluates to true when passed each of the dropped entries (or key/value pairs).

         def shopping = [milk:1, bread:2, chocolate:3]
         assert shopping.dropWhile{ it.key.size() < 6 } == [chocolate:3]
         assert shopping.dropWhile{ it.value % 2 } == [bread:2, chocolate:3]
         assert shopping.dropWhile{ k, v -> k.size() + v <= 7 } == [chocolate:3]

    If the map instance does not have ordered keys, then this function could appear to drop random entries. Groovy by default uses LinkedHashMap, so this shouldn't be an issue in the main.
    Parameters:
      `self` - a Map
      `condition` - a 1 (or 2) arg Closure that must evaluate to true for the entry (or key and value) to continue dropping elements
    Returns:
      the shortest suffix of the given Map such that the given closure condition evaluates to true for each element dropped from the front of the Map
    Since:
      1.8.7

  - ### dropWhile

    public static <T> T[] dropWhile(T[] self, Closure<?> condition)
    Create a suffix of the given array by dropping as many elements as possible from the front of the original array such that calling the given closure condition evaluates to true when passed each of the dropped elements.

         def nums = [ 1, 3, 2 ] as Integer[]
         assert nums.dropWhile{ it <= 3 } == [ ] as Integer[]
         assert nums.dropWhile{ it < 3 } == [ 3, 2 ] as Integer[]
         assert nums.dropWhile{ it != 2 } == [ 2 ] as Integer[]
         assert nums.dropWhile{ it == 0 } == [ 1, 3, 2 ] as Integer[]

    Parameters:
      `self` - the original array
      `condition` - the closure that must evaluate to true to continue dropping elements
    Returns:
      the shortest suffix of the given array such that the given closure condition evaluates to true for each element dropped from the front of the array
    Since:
      1.8.7

  - ### dropWhile

    public static <T> Iterator<T> dropWhile(Iterator<T> self, Closure<?> condition)
    Creates an Iterator that returns a suffix of the elements from an original Iterator. As many elements as possible are dropped from the front of the original Iterator such that calling the given closure condition evaluates to true when passed each of the dropped elements.

         def a = 0
         def iter = [ hasNext:{ a < 10 }, next:{ a++ } ] as Iterator
         assert [].iterator().dropWhile{ it < 3 }.toList() == []
         assert [1, 2, 3, 4, 5].iterator().dropWhile{ it < 3 }.toList() == [ 3, 4, 5 ]
         assert iter.dropWhile{ it < 5 }.toList() == [ 5, 6, 7, 8, 9 ]

    Parameters:
      `self` - the Iterator
      `condition` - the closure that must evaluate to true to continue dropping elements
    Returns:
      the shortest suffix of elements from the given Iterator such that the given closure condition evaluates to true for each element dropped from the front of the Iterator
    Since:
      1.8.7

  - ### asCollection

    public static <T> Collection<T> asCollection(Iterable<T> self)
    Converts this Iterable to a Collection. Returns the original Iterable if it is already a Collection.

    Example usage:

         assert new HashSet().asCollection() instanceof Collection

    Parameters:
      `self` - an Iterable to be converted into a Collection
    Returns:
      a newly created List if this Iterable is not already a Collection
    Since:
      2.4.0

  - ### asList

    public static <T> List<T> asList(Iterable<T> self)
    Converts this Iterable to a List. Returns the original Iterable if it is already a List.

    Example usage:

         assert new HashSet().asList() instanceof List

    Parameters:
      `self` - an Iterable to be converted into a List
    Returns:
      a newly created List if this Iterable is not already a List
    Since:
      2.2.0

  - ### asBoolean

    public static boolean asBoolean(Object object)
    Coerce an object instance to a boolean value. An object is coerced to true if it's not null, to false if it is null.
    Parameters:
      `object` - the object to coerce
    Returns:
      the boolean value
    Since:
      1.7.0

  - ### asBoolean

    public static boolean asBoolean(Boolean bool)
    Coerce a Boolean instance to a boolean value.
    Parameters:
      `bool` - the Boolean
    Returns:
      the boolean value
    Since:
      1.7.0

  - ### asBoolean

    public static boolean asBoolean(Collection collection)
    Coerce a collection instance to a boolean value. A collection is coerced to false if it's empty, and to true otherwise.

        assert [1,2].asBoolean() == true

        assert [].asBoolean() == false

    Parameters:
      `collection` - the collection
    Returns:
      the boolean value
    Since:
      1.7.0

  - ### asBoolean

    public static boolean asBoolean(Map map)
    Coerce a map instance to a boolean value. A map is coerced to false if it's empty, and to true otherwise.

        assert [:] as Boolean == false
         assert [a:2] as Boolean == true

    Parameters:
      `map` - the map
    Returns:
      the boolean value
    Since:
      1.7.0

  - ### asBoolean

    public static boolean asBoolean(Iterator iterator)
    Coerce an iterator instance to a boolean value. An iterator is coerced to false if there are no more elements to iterate over, and to true otherwise.
    Parameters:
      `iterator` - the iterator
    Returns:
      the boolean value
    Since:
      1.7.0

  - ### asBoolean

    public static boolean asBoolean(Enumeration enumeration)
    Coerce an enumeration instance to a boolean value. An enumeration is coerced to false if there are no more elements to enumerate, and to true otherwise.
    Parameters:
      `enumeration` - the enumeration
    Returns:
      the boolean value
    Since:
      1.7.0

  - ### asBoolean

    public static boolean asBoolean(Object[] array)
    Coerce an Object array to a boolean value. An Object array is false if the array is of length 0. and to true otherwise
    Parameters:
      `array` - the array
    Returns:
      the boolean value
    Since:
      1.7.0

  - ### asBoolean

    public static boolean asBoolean(byte[] array)
    Coerces a byte array to a boolean value. A byte array is false if the array is of length 0, and true otherwise.
    Parameters:
      `array` - an array
    Returns:
      the array's boolean value
    Since:
      1.7.4

  - ### asBoolean

    public static boolean asBoolean(short[] array)
    Coerces a short array to a boolean value. A short array is false if the array is of length 0, and true otherwise.
    Parameters:
      `array` - an array
    Returns:
      the array's boolean value
    Since:
      1.7.4

  - ### asBoolean

    public static boolean asBoolean(int[] array)
    Coerces an int array to a boolean value. An int array is false if the array is of length 0, and true otherwise.
    Parameters:
      `array` - an array
    Returns:
      the array's boolean value
    Since:
      1.7.4

  - ### asBoolean

    public static boolean asBoolean(long[] array)
    Coerces a long array to a boolean value. A long array is false if the array is of length 0, and true otherwise.
    Parameters:
      `array` - an array
    Returns:
      the array's boolean value
    Since:
      1.7.4

  - ### asBoolean

    public static boolean asBoolean(float[] array)
    Coerces a float array to a boolean value. A float array is false if the array is of length 0, and true otherwise.
    Parameters:
      `array` - an array
    Returns:
      the array's boolean value
    Since:
      1.7.4

  - ### asBoolean

    public static boolean asBoolean(double[] array)
    Coerces a double array to a boolean value. A double array is false if the array is of length 0, and true otherwise.
    Parameters:
      `array` - an array
    Returns:
      the array's boolean value
    Since:
      1.7.4

  - ### asBoolean

    public static boolean asBoolean(boolean[] array)
    Coerces a boolean array to a boolean value. A boolean array is false if the array is of length 0, and true otherwise.
    Parameters:
      `array` - an array
    Returns:
      the array's boolean value
    Since:
      1.7.4

  - ### asBoolean

    public static boolean asBoolean(char[] array)
    Coerces a char array to a boolean value. A char array is false if the array is of length 0, and true otherwise.
    Parameters:
      `array` - an array
    Returns:
      the array's boolean value
    Since:
      1.7.4

  - ### asBoolean

    public static boolean asBoolean(Character character)
    Coerce a character to a boolean value. A character is coerced to false if it's character value is equal to 0, and to true otherwise.
    Parameters:
      `character` - the character
    Returns:
      the boolean value
    Since:
      1.7.0

  - ### asBoolean

    public static boolean asBoolean(Float object)
    Coerce a Float instance to a boolean value.
    Parameters:
      `object` - the Float
    Returns:
      `true` for non-zero and non-NaN values, else `false`
    Since:
      2.6.0

  - ### asBoolean

    public static boolean asBoolean(Double object)
    Coerce a Double instance to a boolean value.
    Parameters:
      `object` - the Double
    Returns:
      `true` for non-zero and non-NaN values, else `false`
    Since:
      2.6.0

  - ### asBoolean

    public static boolean asBoolean(Number number)
    Coerce a number to a boolean value. A number is coerced to false if its double value is equal to 0, and to true otherwise.
    Parameters:
      `number` - the number
    Returns:
      the boolean value
    Since:
      1.7.0

  - ### asType

    public static <T> T asType(Iterable iterable, Class<T> clazz)
    Converts the given iterable to another type.
    Parameters:
      `iterable` - an Iterable
      `clazz` - the desired class
    Returns:
      the object resulting from this type conversion
    Since:
      2.4.12
    See Also:
      - `asType(Collection, Class)`

  - ### asType

    public static <T> T asType(Collection col, Class<T> clazz)
    Converts the given collection to another type. A default concrete type is used for List, Set, or SortedSet. If the given type has a constructor taking a collection, that is used. Otherwise, the call is deferred to `asType(Object,Class)`. If this collection is already of the given type, the same instance is returned.
    Parameters:
      `col` - a collection
      `clazz` - the desired class
    Returns:
      the object resulting from this type conversion
    Since:
      1.0
    See Also:
      - `asType(java.lang.Object, java.lang.Class)`

  - ### asType

    public static <T> T asType(Object[] ary, Class<T> clazz)
    Converts the given array to either a List, Set, or SortedSet. If the given class is something else, the call is deferred to `asType(Object,Class)`.
    Parameters:
      `ary` - an array
      `clazz` - the desired class
    Returns:
      the object resulting from this type conversion
    Since:
      1.5.1
    See Also:
      - `asType(java.lang.Object, java.lang.Class)`

  - ### asType

    public static <T> T asType(Closure impl, Class<T> type)
    Coerces the closure to an implementation of the given class. The class is assumed to be an interface or class with a single method definition. The closure is used as the implementation of that single method.
    Parameters:
      `impl` - the implementation of the single method
      `type` - the target type
    Returns:
      A proxy of the given type which wraps this closure.
    Since:
      1.0

  - ### asType

    public static <T> T asType(Map map, Class<T> clazz)
    Coerces this map to the given type, using the map's keys as the public method names, and values as the implementation. Typically the value would be a closure which behaves like the method implementation.
    Parameters:
      `map` - this map
      `clazz` - the target type
    Returns:
      a Proxy of the given type, which defers calls to this map's elements.
    Since:
      1.0

  - ### shuffle

    public static void shuffle(List<?> self)
    Randomly reorders the elements of the specified list.

         def list = ["a", 4, false]
         def origSize = list.size()
         def origCopy = new ArrayList(list)
         list.shuffle()
         assert list.size() == origSize
         assert origCopy.every{ list.contains(it) }

    Parameters:
      `self` - a List
    Since:
      3.0.0
    See Also:
      - `Collections.shuffle(List)`

  - ### shuffle

    public static void shuffle(List<?> self, Random rnd)
    Randomly reorders the elements of the specified list using the specified random instance as the source of randomness.

         def r = new Random()
         def list = ["a", 4, false]
         def origSize = list.size()
         def origCopy = new ArrayList(list)
         list.shuffle(r)
         assert list.size() == origSize
         assert origCopy.every{ list.contains(it) }

    Parameters:
      `self` - a List
    Since:
      3.0.0
    See Also:
      - `Collections.shuffle(List)`

  - ### shuffled

    public static <T> List<T> shuffled(List<T> self)
    Creates a new list containing the elements of the specified list but in a random order.

         def orig = ["a", 4, false]
         def shuffled = orig.shuffled()
         assert orig.size() == shuffled.size()
         assert orig.every{ shuffled.contains(it) }

    Parameters:
      `self` - a List
    Since:
      3.0.0
    See Also:
      - `Collections.shuffle(List)`

  - ### shuffled

    public static <T> List<T> shuffled(List<T> self, Random rnd)
    Creates a new list containing the elements of the specified list but in a random order using the specified random instance as the source of randomness.

         def r = new Random()
         def orig = ["a", 4, false]
         def shuffled = orig.shuffled(r)
         assert orig.size() == shuffled.size()
         assert orig.every{ shuffled.contains(it) }

    Parameters:
      `self` - a List
    Since:
      3.0.0
    See Also:
      - `Collections.shuffle(List)`

  - ### shuffle

    public static <T> void shuffle(T[] self)
    Randomly reorders the elements of the specified array.

         Integer[] array = [10, 5, 20]
         def origSize = array.size()
         def items = array.toList()
         array.shuffle()
         assert array.size() == origSize
         assert items.every{ array.contains(it) }

    Parameters:
      `self` - an array
    Since:
      3.0.0

  - ### shuffle

    public static <T> void shuffle(T[] self, Random rnd)
    Randomly reorders the elements of the specified array using the specified random instance as the source of randomness.

         def r = new Random()
         Integer[] array = [10, 5, 20]
         def origSize = array.size()
         def items = array.toList()
         array.shuffle(r)
         assert array.size() == origSize
         assert items.every{ array.contains(it) }

    Parameters:
      `self` - an array
    Since:
      3.0.0

  - ### shuffled

    public static <T> T[] shuffled(T[] self)
    Creates a new array containing the elements of the specified array but in a random order.

         Integer[] orig = [10, 5, 20]
         def array = orig.shuffled()
         assert orig.size() == array.size()
         assert orig.every{ array.contains(it) }

    Parameters:
      `self` - an array
    Returns:
      the shuffled array
    Since:
      3.0.0

  - ### shuffled

    public static <T> T[] shuffled(T[] self, Random rnd)
    Creates a new array containing the elements of the specified array but in a random order using the specified random instance as the source of randomness.

         def r = new Random()
         Integer[] orig = [10, 5, 20]
         def array = orig.shuffled(r)
         assert orig.size() == array.size()
         assert orig.every{ array.contains(it) }

    Parameters:
      `self` - an array
    Returns:
      the shuffled array
    Since:
      3.0.0

  - ### asReversed

    public static <T> List<T> asReversed(List<T> self)
    Creates a view list with reversed order, and the order of original list will not change.

         def list = ["a", 6, true]
         assert list.asReversed() == [true, 6, "a"]
         assert list == ["a", 6, true]

    Type Parameters:
      `T` - the type of element
    Parameters:
      `self` - a list
    Returns:
      the reversed list
    Since:
      4.0.0

  - ### asReversed

    public static <T> NavigableSet<T> asReversed(NavigableSet<T> self)
    Creates a reverse order view of the set. The order of original list will not change.

         TreeSet navSet = [2, 4, 1, 3]  // natural order is sorted
         assert navSet.asReversed() == [4, 3, 2, 1] as Set

    Type Parameters:
      `T` - the type of element
    Parameters:
      `self` - a NavigableSet
    Returns:
      the reversed view NavigableSet
    Since:
      4.0.11

  - ### reverse

    public static <T> List<T> reverse(List<T> self)
    Creates a new List with the identical contents to this list but in reverse order.

         def list = ["a", 4, false]
         assert list.reverse() == [false, 4, "a"]
         assert list == ["a", 4, false]

    Parameters:
      `self` - a List
    Returns:
      a reversed List
    Since:
      1.0
    See Also:
      - `reverse(List, boolean)`

  - ### reverse

    public static <T> List<T> reverse(List<T> self, boolean mutate)
    Reverses the elements in a list. If mutate is true, the original list is modified in place and returned. Otherwise, a new list containing the reversed items is produced.

         def list = ["a", 4, false]
         assert list.reverse(false) == [false, 4, "a"]
         assert list == ["a", 4, false]
         assert list.reverse(true) == [false, 4, "a"]
         assert list == [false, 4, "a"]

    Parameters:
      `self` - a List
      `mutate` - true if the list itself should be reversed in place and returned, false if a new list should be created
    Returns:
      a reversed List
    Since:
      1.8.1

  - ### reverse

    public static <T> T[] reverse(T[] self)
    Creates a new array containing items which are the same as this array but in reverse order.
    Parameters:
      `self` - an array
    Returns:
      an array containing the reversed items
    Since:
      1.5.5
    See Also:
      - `reverse(Object[], boolean)`

  - ### reverse

    public static <T> T[] reverse(T[] self, boolean mutate)
    Reverse the items in an array. If mutate is true, the original array is modified in place and returned. Otherwise, a new array containing the reversed items is produced.

         def array = new Object[] {1,2,3}
         def yarra = array.reverse(true)
         assert array == 3..1
         assert yarra == 3..1

         yarra = array.reverse(false)
         assert array == 3..1
         assert yarra == 1..3

    Parameters:
      `self` - an array
      `mutate` - `true` if the array itself should be reversed in place, `false` if a new array should be created
    Returns:
      an array containing the reversed items
    Since:
      1.8.1

  - ### reverse

    public static <T> Iterator<T> reverse(Iterator<T> self)
    Reverses the iterator. The original iterator will become exhausted of elements after determining the reversed values. A new iterator for iterating through the reversed values is returned.
    Parameters:
      `self` - an Iterator
    Returns:
      a reversed Iterator
    Since:
      1.5.5

  - ### plus

    public static <T> T[] plus(T[] left, Object[] right)
    Create an array as a union of two arrays.

         Integer[] a = [1, 2, 3]
         Integer[] b = [4, 5, 6]
         def result = a + b
         assert result.class == Integer[]
         assert result == new Integer[]{1, 2, 3, 4, 5, 6}

         Number[] c = [-1, 0.9, null]
         result = c + a
         assert result.class == Number[]
         assert result == new Number[]{-1, 0.9, null, 1, 2, 3}

         result = a + c
         assert result.class == Integer[]
         assert result == new Integer[]{1, 2, 3, -1, 0, null}

         Date[] d = [new Date()]
         // improper type arguments; Date can't be coerced to Integer
         groovy.test.GroovyAssert.shouldFail(ClassCastException) { a + d }

    Parameters:
      `left` - the left Array
      `right` - the right Array
    Returns:
      A new array containing right appended to left.
    Throws:
      `ClassCastException` - if any elements from right aren't compatible (according to `DefaultTypeTransformation.castToType(Object, Class)`) to the component type of left
    Since:
      1.8.7

  - ### plus

    public static <T> T[] plus(T[] left, Object right)
    Create an array containing elements from an original array plus an additional appended element.

         Integer[] a = [1, 2, 3]
         def result = a + 4
         assert result.class == Integer[]
         assert result == new Integer[]{1, 2, 3, 4}

         result = a + 5.5d
         assert result.class == Integer[]
         assert result == new Integer[]{1, 2, 3, 5}

         // improper type arguments; Date can't be coerced to Integer
         groovy.test.GroovyAssert.shouldFail(ClassCastException) { a + new Date() }

    Parameters:
      `left` - the array
      `right` - the value to append
    Returns:
      A new array containing left with right appended to it.
    Throws:
      `ClassCastException` - if any elements from right aren't compatible (according to `DefaultTypeTransformation.castToType(Object, Class)`) to the component type of left
    Since:
      1.8.7

  - ### plus

    public static <T> T[] plus(T[] left, Collection<?> right)
    Create an array containing elements from an original array plus those from a Collection.

         Integer[] a = [1, 2, 3]
         def result = a + [4, 5, 6]
         assert result.class == Integer[]
         assert result == new Integer[]{1, 2, 3, 4, 5, 6}

         Number[] c = [-1, 0.9, null]
         result = c + [1, 2, 3]
         assert result.class == Number[]
         assert result == new Number[]{-1, 0.9, null, 1, 2, 3}

         result = a + [-1, 0.9, null]
         assert result.class == Integer[]
         assert result == new Integer[]{1, 2, 3, -1, 0, null}

         // improper type arguments; Date can't be coerced to Integer
         groovy.test.GroovyAssert.shouldFail(ClassCastException) { a + [new Date()] }

    Parameters:
      `left` - the array
      `right` - a Collection to be appended
    Returns:
      A new array containing left with right appended to it.
    Throws:
      `ClassCastException` - if any elements from right aren't compatible (according to `DefaultTypeTransformation.castToType(Object, Class)`) to the component type of left
    Since:
      1.8.7

  - ### plus

    public static <T> T[] plus(T[] left, Iterable<?> right)
    Create an array containing elements from an original array plus those from an Iterable.

         class AbcIterable implements Iterable {
             Iterator iterator() { "abc".iterator() }
         }
         String[] array = ['x', 'y', 'z']
         def result = array + new AbcIterable()
         assert result.class == String[]
         assert result == new String[]{'x', 'y', 'z', 'a', 'b', 'c'}

    Parameters:
      `left` - the array
      `right` - an Iterable to be appended
    Returns:
      A new array containing elements from left with those from right appended.
    Throws:
      `ClassCastException` - if any elements from right aren't compatible (according to `DefaultTypeTransformation.castToType(Object, Class)`) to the component type of left
    Since:
      1.8.7
    See Also:
      - `union(Object[], Iterable)`

  - ### union

    public static Object[] union(Object[] left, Object[] right)
    Create an Object array as a union of two arrays. This is similar to `plus(Object[], Object[])` but always return an Object array and so might be more applicable when adding heterogeneous arrays.

         Integer[] a = [1, 2, 3]
         String[] b = ['foo', 'bar']
         def result = a.union(b)
         assert result.class == Object[]
         assert result == new Object[]{1, 2, 3, 'foo', 'bar'}

    Parameters:
      `left` - the left Array
      `right` - the right Array
    Returns:
      A new Object array containing right appended to left.
    Since:
      4.0.0

  - ### union

    public static Object[] union(Object[] left, Object right)
    Create an Object array containing elements from an original array plus an additional appended element. This is similar to `plus(Object[], Object)` but always return an Object array and so might be more applicable when adding heterogeneous arrays.

         Integer[] a = [1, 2, 3]
         def result = a.union('foo')
         assert result.class == Object[]
         assert result == new Object[]{1, 2, 3, 'foo'}

    Parameters:
      `left` - the array
      `right` - the value to append
    Returns:
      A new Object array containing left with right appended to it.
    Since:
      4.0.0

  - ### union

    public static Object[] union(Object[] left, Collection<?> right)
    Create an object array containing elements from an original array plus those from a Collection. This is similar to `plus(Object[], Collection)` but always return an Object array and so might be more applicable when adding heterogeneous arrays.

         Integer[] a = [1, 2, 3]
         def result = a.union(['foo', 'bar'])
         assert result.class == Object[]
         assert result == new Object[]{1, 2, 3, 'foo', 'bar'}

    Parameters:
      `left` - the array
      `right` - a Collection to be appended
    Returns:
      A new Object array containing left with right appended to it.
    Since:
      4.0.0

  - ### union

    public static Object[] union(Object[] left, Iterable<?> right)
    Create an Object array containing elements from an original array plus those from an Iterable. This is similar to `plus(Object[], Iterable)` but always return an Object array and so might be more applicable when adding heterogeneous arrays.

         class AbcIterable implements Iterable {
             Iterator iterator() { "abc".iterator() }
         }
         String[] array = ['x', 'y', 'z']
         def result = array.union(new AbcIterable())
         assert result.class == Object[]
         assert result == new Object[]{'x', 'y', 'z', 'a', 'b', 'c'}

    Parameters:
      `left` - the array
      `right` - an Iterable to be appended
    Returns:
      A new Object array containing elements from left with those from right appended.
    Since:
      4.0.0

  - ### plus

    public static <T> Collection<T> plus(Collection<T> left, Collection<T> right)
    Create a Collection as a union of two collections. If the left collection is a Set, then the returned collection will be a Set otherwise a List. This operation will always create a new object for the result, while the operands remain unchanged.

        assert [1,2,3,4] == [1,2] + [3,4]

    Parameters:
      `left` - the left Collection
      `right` - the right Collection
    Returns:
      the merged Collection
    Since:
      1.5.0

  - ### plus

    public static <T> Collection<T> plus(Iterable<T> left, Iterable<T> right)
    Create a Collection as a union of two iterables. If the left iterable is a Set, then the returned collection will be a Set otherwise a List. This operation will always create a new object for the result, while the operands remain unchanged.

        assert [1,2,3,4] == [1,2] + [3,4]

    Parameters:
      `left` - the left Iterable
      `right` - the right Iterable
    Returns:
      the merged Collection
    Since:
      2.4.0

  - ### plus

    public static <T> Collection<T> plus(Collection<T> left, Iterable<T> right)
    Create a Collection as a union of a Collection and an Iterable. If the left collection is a Set, then the returned collection will be a Set otherwise a List. This operation will always create a new object for the result, while the operands remain unchanged.
    Parameters:
      `left` - the left Collection
      `right` - the right Iterable
    Returns:
      the merged Collection
    Since:
      1.8.7
    See Also:
      - `plus(Collection, Collection)`

  - ### plus

    public static <T> List<T> plus(List<T> left, Iterable<T> right)
    Create a List as a union of a List and an Iterable. This operation will always create a new object for the result, while the operands remain unchanged.
    Parameters:
      `left` - the left List
      `right` - the right Iterable
    Returns:
      the merged List
    Since:
      2.4.0
    See Also:
      - `plus(Collection, Collection)`

  - ### plus

    public static <T> List<T> plus(List<T> left, Collection<T> right)
    Create a List as a union of a List and a Collection. This operation will always create a new object for the result, while the operands remain unchanged.
    Parameters:
      `left` - the left List
      `right` - the right Collection
    Returns:
      the merged List
    Since:
      2.4.0
    See Also:
      - `plus(Collection, Collection)`

  - ### plus

    public static <T> Set<T> plus(Set<T> left, Iterable<T> right)
    Create a Set as a union of a Set and an Iterable. This operation will always create a new object for the result, while the operands remain unchanged.
    Parameters:
      `left` - the left Set
      `right` - the right Iterable
    Returns:
      the merged Set
    Since:
      2.4.0
    See Also:
      - `plus(Collection, Collection)`

  - ### plus

    public static <T> Set<T> plus(Set<T> left, Collection<T> right)
    Create a Set as a union of a Set and a Collection. This operation will always create a new object for the result, while the operands remain unchanged.
    Parameters:
      `left` - the left Set
      `right` - the right Collection
    Returns:
      the merged Set
    Since:
      2.4.0
    See Also:
      - `plus(Collection, Collection)`

  - ### plus

    public static <T> SortedSet<T> plus(SortedSet<T> left, Iterable<T> right)
    Create a SortedSet as a union of a SortedSet and an Iterable. This operation will always create a new object for the result, while the operands remain unchanged.
    Parameters:
      `left` - the left SortedSet
      `right` - the right Iterable
    Returns:
      the merged SortedSet
    Since:
      2.4.0
    See Also:
      - `plus(Collection, Collection)`

  - ### plus

    public static <T> SortedSet<T> plus(SortedSet<T> left, Collection<T> right)
    Create a SortedSet as a union of a SortedSet and a Collection. This operation will always create a new object for the result, while the operands remain unchanged.
    Parameters:
      `left` - the left SortedSet
      `right` - the right Collection
    Returns:
      the merged SortedSet
    Since:
      2.4.0
    See Also:
      - `plus(Collection, Collection)`

  - ### plus

    public static <T> List<T> plus(List<T> self, int index, T[] items)
    Creates a new List by inserting all the elements in the specified array to the elements from the original List at the specified index. Shifts the element currently at that index (if any) and any subsequent elements to the right (increasing their indices). The new elements will appear in the resulting List in the order that they occur in the original array. The behavior of this operation is undefined if the list or array operands are modified while the operation is in progress. The original list and array operands remain unchanged.

         def items = [1, 2, 3]
         def newItems = items.plus(2, 'a'..'c' as String[])
         assert newItems == [1, 2, 'a', 'b', 'c', 3]
         assert items == [1, 2, 3]

    See also `addAll` for similar functionality with modify semantics, i.e. which performs the changes on the original list itself.
    Parameters:
      `self` - an original list
      `items` - array containing elements to be merged with elements from the original list
      `index` - index at which to insert the first element from the specified array
    Returns:
      the new list
    Since:
      1.8.1
    See Also:
      - `plus(List, int, List)`

  - ### plus

    public static <T> List<T> plus(List<T> self, int index, List<T> additions)
    Creates a new List by inserting all the elements in the given additions List to the elements from the original List at the specified index. Shifts the element currently at that index (if any) and any subsequent elements to the right (increasing their indices). The new elements will appear in the resulting List in the order that they occur in the original lists. The behavior of this operation is undefined if the original lists are modified while the operation is in progress. The original lists remain unchanged.

         def items = [1, 2, 3]
         def newItems = items.plus(2, 'a'..'c')
         assert newItems == [1, 2, 'a', 'b', 'c', 3]
         assert items == [1, 2, 3]

    See also `addAll` for similar functionality with modify semantics, i.e. which performs the changes on the original list itself.
    Parameters:
      `self` - an original List
      `additions` - a List containing elements to be merged with elements from the original List
      `index` - index at which to insert the first element from the given additions List
    Returns:
      the new list
    Since:
      1.8.1

  - ### plus

    public static <T> List<T> plus(List<T> self, int index, Iterable<T> additions)
    Creates a new List by inserting all the elements in the given Iterable to the elements from this List at the specified index.
    Parameters:
      `self` - an original list
      `additions` - an Iterable containing elements to be merged with the elements from the original List
      `index` - index at which to insert the first element from the given additions Iterable
    Returns:
      the new list
    Since:
      1.8.7
    See Also:
      - `plus(List, int, List)`

  - ### plus

    public static <T> Collection<T> plus(Collection<T> left, T right)
    Create a collection as a union of a Collection and an Object. If the collection is a Set, then the returned collection will be a Set otherwise a List. This operation will always create a new object for the result, while the operands remain unchanged.

        assert [1,2,3] == [1,2] + 3

    Parameters:
      `left` - a Collection
      `right` - an object to add/append
    Returns:
      the resulting Collection
    Since:
      1.5.0

  - ### plus

    public static <T> Collection<T> plus(Iterable<T> left, T right)
    Create a collection as a union of an Iterable and an Object. If the iterable is a Set, then the returned collection will be a Set otherwise a List. This operation will always create a new object for the result, while the operands remain unchanged.

        assert [1,2,3] == [1,2] + 3

    Parameters:
      `left` - an Iterable
      `right` - an object to add/append
    Returns:
      the resulting Collection
    Since:
      2.4.0

  - ### plus

    public static <T> List<T> plus(List<T> left, T right)
    Create a List as a union of a List and an Object. This operation will always create a new object for the result, while the operands remain unchanged.

        assert [1,2,3] == [1,2] + 3

    Parameters:
      `left` - a List
      `right` - an object to add/append
    Returns:
      the resulting List
    Since:
      2.4.0

  - ### plus

    public static <T> Set<T> plus(Set<T> left, T right)
    Create a Set as a union of a Set and an Object. This operation will always create a new object for the result, while the operands remain unchanged.

        assert [1,2,3] == [1,2] + 3

    Parameters:
      `left` - a Set
      `right` - an object to add/append
    Returns:
      the resulting Set
    Since:
      2.4.0

  - ### plus

    public static <T> SortedSet<T> plus(SortedSet<T> left, T right)
    Create a SortedSet as a union of a SortedSet and an Object. This operation will always create a new object for the result, while the operands remain unchanged.

        assert [1,2,3] == [1,2] + 3

    Parameters:
      `left` - a SortedSet
      `right` - an object to add/append
    Returns:
      the resulting SortedSet
    Since:
      2.4.0

  - ### multiply

    public static <T> Collection<T> multiply(Iterable<T> self, Number factor)
    Create a Collection composed of the elements of this Iterable, repeated a certain number of times. Note that for non-primitive elements, multiple references to the same instance will be added.

        assert [1,2,3,1,2,3] == [1,2,3] * 2

    Note: if the Iterable happens to not support duplicates, e.g. a Set, then the method will effectively return a Collection with a single copy of the Iterable's items.
    Parameters:
      `self` - an Iterable
      `factor` - the number of times to append
    Returns:
      the multiplied Collection
    Since:
      2.4.0

  - ### multiply

    public static <T> List<T> multiply(List<T> self, Number factor)
    Create a List composed of the elements of this Iterable, repeated a certain number of times. Note that for non-primitive elements, multiple references to the same instance will be added.

        assert [1,2,3,1,2,3] == [1,2,3] * 2

    Note: if the Iterable happens to not support duplicates, e.g. a Set, then the method will effectively return a Collection with a single copy of the Iterable's items.
    Parameters:
      `self` - a List
      `factor` - the number of times to append
    Returns:
      the multiplied List
    Since:
      2.4.0

  - ### intersect

    public static <T> Collection<T> intersect(Collection<T> left, Collection<T> right)
    Create a Collection composed of the intersection of both collections. Any elements that exist in both collections are added to the resultant collection. For collections of custom objects; the objects should implement java.lang.Comparable

        assert [4,5] == [1,2,3,4,5].intersect([4,5,6,7,8])

    By default, Groovy uses a `NumberAwareComparator` when determining if an element exists in both collections.
    Parameters:
      `left` - a Collection
      `right` - a Collection
    Returns:
      a Collection as an intersection of both collections
    Since:
      1.5.6
    See Also:
      - `intersect(Collection, Collection, Comparator)`

  - ### intersect

    public static <T> Collection<T> intersect(Collection<T> left, Collection<T> right, Comparator<? super T> comparator)
    Create a Collection composed of the intersection of both collections. Any elements that exist in both collections are added to the resultant collection. For collections of custom objects; the objects should implement java.lang.Comparable

         assert [3,4] == [1,2,3,4].intersect([3,4,5,6], Comparator.naturalOrder())
         assert [2,4] == [1,2,3,4].intersect([4,8,12,16,20], (x, y) -> x * x <=> y)

         def one = ['a', 'B', 'c', 'd']
         def two = ['b', 'C', 'd', 'e']
         def compareIgnoreCase = { a, b -> a.toLowerCase() <=> b.toLowerCase() }
         assert one.intersect(two) == ['d']
         assert two.intersect(one) == ['d']
         assert one.intersect(two, compareIgnoreCase) == ['B', 'c', 'd']
         assert two.intersect(one, compareIgnoreCase) == ['b', 'C', 'd']

    Parameters:
      `left` - a Collection
      `right` - a Collection
      `comparator` - a Comparator
    Returns:
      a Collection as an intersection of both collections
    Since:
      2.5.0

  - ### intersect

    public static <T> Collection<T> intersect(Iterable<T> left, Iterable<T> right)
    Create a Collection composed of the intersection of both iterables. Any elements that exist in both iterables are added to the resultant collection. For iterables of custom objects; the objects should implement java.lang.Comparable

         assert [4,5] == [1,2,3,4,5].intersect([4,5,6,7,8])

    By default, Groovy uses a `NumberAwareComparator` when determining if an element exists in both collections.
    Parameters:
      `left` - an Iterable
      `right` - an Iterable
    Returns:
      a Collection as an intersection of both iterables
    Since:
      2.4.0
    See Also:
      - `intersect(Iterable, Iterable, Comparator)`

  - ### intersect

    public static <T> Collection<T> intersect(Iterable<T> left, Iterable<T> right, Comparator<? super T> comparator)
    Create a Collection composed of the intersection of both iterables. Any elements that exist in both iterables are added to the resultant collection. For iterables of custom objects; the objects should implement java.lang.Comparable

         assert [3,4] == [1,2,3,4].intersect([3,4,5,6], Comparator.naturalOrder())

    Parameters:
      `left` - an Iterable
      `right` - an Iterable
      `comparator` - a Comparator
    Returns:
      a Collection as an intersection of both iterables
    Since:
      2.5.0

  - ### intersect

    public static <T> Collection<T> intersect(Iterable<T> left, Iterable<T> right, Closure condition)
    Create a Collection composed of the intersection of both iterables. Elements from teh first iterable which also occur (according to the comparator closure) in the second iterable are added to the result. If the closure takes a single parameter, the argument passed will be each element, and the closure should return a value used for comparison (either using `Comparable.compareTo(java.lang.Object)` or `Object.equals(java.lang.Object)`). If the closure takes two parameters, two items from the Iterator will be passed as arguments, and the closure should return an int value (with 0 indicating the items are deemed equal).

         def one = ['a', 'B', 'c', 'd']
         def two = ['b', 'C', 'd', 'e']
         def compareIgnoreCase = { it.toLowerCase() }
         assert one.intersect(two, compareIgnoreCase) == ['B', 'c', 'd']
         assert two.intersect(one, compareIgnoreCase) == ['b', 'C', 'd']

    Parameters:
      `left` - an Iterable
      `right` - an Iterable
      `condition` - a Closure used to determine unique items
    Returns:
      a Collection as an intersection of both iterables
    Since:
      4.0.0

  - ### intersect

    public static <T> List<T> intersect(List<T> left, Iterable<T> right)
    Create a List composed of the intersection of a List and an Iterable. Any elements that exist in both iterables are added to the resultant collection.

         assert [4,5] == [1,2,3,4,5].intersect([4,5,6,7,8])

    By default, Groovy uses a `NumberAwareComparator` when determining if an element exists in both collections.
    Parameters:
      `left` - a List
      `right` - an Iterable
    Returns:
      a List as an intersection of a List and an Iterable
    Since:
      2.4.0
    See Also:
      - `intersect(List, Iterable, Comparator)`

  - ### intersect

    public static <T> List<T> intersect(List<T> left, Iterable<T> right, Comparator<? super T> comparator)
    Create a List composed of the intersection of a List and an Iterable. Any elements that exist in both iterables are added to the resultant collection.

         assert [3,4] == [1,2,3,4].intersect([3,4,5,6])

    Parameters:
      `left` - a List
      `right` - an Iterable
      `comparator` - a Comparator
    Returns:
      a List as an intersection of a List and an Iterable
    Since:
      2.5.0

  - ### intersect

    public static <T> Set<T> intersect(Set<T> left, Iterable<T> right)
    Create a Set composed of the intersection of a Set and an Iterable. Any elements that exist in both iterables are added to the resultant collection.

         assert [4,5] as Set == ([1,2,3,4,5] as Set).intersect([4,5,6,7,8])

    By default, Groovy uses a `NumberAwareComparator` when determining if an element exists in both collections.
    Parameters:
      `left` - a Set
      `right` - an Iterable
    Returns:
      a Set as an intersection of a Set and an Iterable
    Since:
      2.4.0
    See Also:
      - `intersect(Set, Iterable, Comparator)`

  - ### intersect

    public static <T> Set<T> intersect(Set<T> left, Iterable<T> right, Comparator<? super T> comparator)
    Create a Set composed of the intersection of a Set and an Iterable. Any elements that exist in both iterables are added to the resultant collection.

         assert [3,4] as Set == ([1,2,3,4] as Set).intersect([3,4,5,6], Comparator.naturalOrder())

    Parameters:
      `left` - a Set
      `right` - an Iterable
      `comparator` - a Comparator
    Returns:
      a Set as an intersection of a Set and an Iterable
    Since:
      2.5.0

  - ### intersect

    public static <T> SortedSet<T> intersect(SortedSet<T> left, Iterable<T> right)
    Create a SortedSet composed of the intersection of a SortedSet and an Iterable. Any elements that exist in both iterables are added to the resultant collection.

         assert [4,5] as SortedSet == ([1,2,3,4,5] as SortedSet).intersect([4,5,6,7,8])

    By default, Groovy uses a `NumberAwareComparator` when determining if an element exists in both collections.
    Parameters:
      `left` - a SortedSet
      `right` - an Iterable
    Returns:
      a Set as an intersection of a SortedSet and an Iterable
    Since:
      2.4.0
    See Also:
      - `intersect(SortedSet, Iterable, Comparator)`

  - ### intersect

    public static <T> SortedSet<T> intersect(SortedSet<T> left, Iterable<T> right, Comparator<? super T> comparator)
    Create a SortedSet composed of the intersection of a SortedSet and an Iterable. Any elements that exist in both iterables are added to the resultant collection.

         assert [4,5] as SortedSet == ([1,2,3,4,5] as SortedSet).intersect([4,5,6,7,8])

    Parameters:
      `left` - a SortedSet
      `right` - an Iterable
      `comparator` - a Comparator
    Returns:
      a Set as an intersection of a SortedSet and an Iterable
    Since:
      2.5.0

  - ### intersect

    public static <K, V> Map<K,V> intersect(Map<K,V> left, Map<K,V> right)
    Create a Map composed of the intersection of both maps. Any entries that exist in both maps are added to the resultant map.

        assert [4:4,5:5] == [1:1,2:2,3:3,4:4,5:5].intersect([4:4,5:5,6:6,7:7,8:8])

        assert [1: 1, 2: 2, 3: 3, 4: 4].intersect( [1: 1.0, 2: 2, 5: 5] ) == [1:1, 2:2]

    Parameters:
      `left` - a map
      `right` - a map
    Returns:
      a Map as an intersection of both maps
    Since:
      1.7.4

  - ### disjoint

    public static boolean disjoint(Iterable left, Iterable right)
    Returns `true` if the intersection of two iterables is empty.

        assert [1,2,3].disjoint([3,4,5]) == false

        assert [1,2].disjoint([3,4]) == true

    Parameters:
      `left` - an Iterable
      `right` - an Iterable
    Returns:
      boolean `true` if the intersection of two iterables is empty, `false` otherwise.
    Since:
      2.4.0

  - ### chop

    public static <T> List<List<T>> chop(T[] self, int... chopSizes)
    Chops the array into pieces, returning lists with sizes corresponding to the supplied chop sizes. If the array isn't large enough, truncated (possibly empty) pieces are returned. Using a chop size of -1 will cause that piece to contain all remaining items from the array.
    Parameters:
      `self` - an Array to be chopped
      `chopSizes` - the sizes for the returned pieces
    Returns:
      a list of lists chopping the original array elements into pieces determined by chopSizes
    Since:
      2.5.2
    See Also:
      - `to chop a list into pieces of a fixed size`

  - ### chop

    public static <T> List<List<T>> chop(Iterable<T> self, int... chopSizes)
    Chops the Iterable into pieces, returning lists with sizes corresponding to the supplied chop sizes. If the Iterable isn't large enough, truncated (possibly empty) pieces are returned. Using a chop size of -1 will cause that piece to contain all remaining items from the Iterable.

    Example usage:

         assert [1, 2, 3, 4].chop(1) == [[1]]
         assert [1, 2, 3, 4].chop(1,-1) == [[1], [2, 3, 4]]
         assert ('a'..'h').chop(2, 4) == [['a', 'b'], ['c', 'd', 'e', 'f']]
         assert ['a', 'b', 'c', 'd', 'e'].chop(3) == [['a', 'b', 'c']]
         assert ['a', 'b', 'c', 'd', 'e'].chop(1, 2, 3) == [['a'], ['b', 'c'], ['d', 'e']]
         assert ['a', 'b', 'c', 'd', 'e'].chop(1, 2, 3, 3, 3) == [['a'], ['b', 'c'], ['d', 'e'], [], []]

    Parameters:
      `self` - an Iterable to be chopped
      `chopSizes` - the sizes for the returned pieces
    Returns:
      a list of lists chopping the original iterable into pieces determined by chopSizes
    Since:
      2.5.2
    See Also:
      - `to chop an Iterable into pieces of a fixed size`

  - ### chop

    public static <T> List<List<T>> chop(Iterator<T> self, int... chopSizes)
    Chops the iterator items into pieces, returning lists with sizes corresponding to the supplied chop sizes. If the iterator is exhausted early, truncated (possibly empty) pieces are returned. Using a chop size of -1 will cause that piece to contain all remaining items from the iterator.
    Parameters:
      `self` - an Iterator to be chopped
      `chopSizes` - the sizes for the returned pieces
    Returns:
      a list of lists chopping the original iterator elements into pieces determined by chopSizes
    Since:
      2.5.2

  - ### equals

    public static boolean equals(int[] left, int[] right)
    Compare the contents of this array to the contents of the given array.
    Parameters:
      `left` - an int array
      `right` - the array being compared
    Returns:
      true if the contents of both arrays are equal.
    Since:
      1.5.0

  - ### equals

    public static boolean equals(Object[] left, List right)
    Determines if the contents of this array are equal to the contents of the given list, in the same order. This returns `false` if either collection is `null`.
    Parameters:
      `left` - an array
      `right` - the List being compared
    Returns:
      true if the contents of both collections are equal
    Since:
      1.5.0

  - ### equals

    public static boolean equals(List left, Object[] right)
    Determines if the contents of this list are equal to the contents of the given array in the same order. This returns `false` if either collection is `null`.

        assert [1, "a"].equals( [ 1, "a" ] as Object[] )

    Parameters:
      `left` - a List
      `right` - the Object[] being compared to
    Returns:
      true if the contents of both collections are equal
    Since:
      1.5.0

  - ### equals

    public static boolean equals(List left, List right)
    Compare the contents of two Lists. Order matters. If numbers exist in the Lists, then they are compared as numbers, for example 2 == 2L. If both lists are `null`, the result is true; otherwise if either list is `null`, the result is `false`.

        assert ["a", 2].equals(["a", 2])
         assert ![2, "a"].equals("a", 2)
         assert [2.0, "a"].equals(2L, "a") // number comparison at work

    Parameters:
      `left` - a List
      `right` - the List being compared to
    Returns:
      boolean `true` if the contents of both lists are identical, `false` otherwise.
    Since:
      1.0

  - ### equals

    public static <T> boolean equals(Set<T> self, Set<T> other)
    Compare the contents of two Sets for equality using Groovy's coercion rules.

    Returns `true` if the two sets have the same size, and every member of the specified set is contained in this set (or equivalently, every member of this set is contained in the specified set). If numbers exist in the sets, then they are compared as numbers, for example 2 == 2L. If both sets are `null`, the result is true; otherwise if either set is `null`, the result is `false`. Example usage:

         Set s1 = ["a", 2]
         def s2 = [2, 'a'] as Set
         Set s3 = [3, 'a']
         def s4 = [2.0, 'a'] as Set
         def s5 = [2L, 'a'] as Set
         assert s1.equals(s2)
         assert !s1.equals(s3)
         assert s1.equals(s4)
         assert s1.equals(s5)

    Parameters:
      `self` - a Set
      `other` - the Set being compared to
    Returns:
      `true` if the contents of both sets are identical
    Since:
      1.8.0

  - ### equals

    public static boolean equals(Map self, Map other)
    Compares two Maps treating coerced numerical values as identical.

    Example usage:

        assert [a:2, b:3] == [a:2L, b:3.0]

    Parameters:
      `self` - this Map
      `other` - the Map being compared to
    Returns:
      `true` if the contents of both maps are identical
    Since:
      1.8.0

  - ### minus

    public static <T> Set<T> minus(Set<T> self, Collection<?> removeMe)
    Create a Set composed of the elements of the first Set minus the elements of the given Collection.
    Parameters:
      `self` - a Set object
      `removeMe` - the items to remove from the Set
    Returns:
      the resulting Set
    Since:
      1.5.0

  - ### minus

    public static <T> Set<T> minus(Set<T> self, Iterable<?> removeMe)
    Create a Set composed of the elements of the first Set minus the elements from the given Iterable.
    Parameters:
      `self` - a Set object
      `removeMe` - the items to remove from the Set
    Returns:
      the resulting Set
    Since:
      1.8.7

  - ### minus

    public static <T> Set<T> minus(Set<T> self, Object removeMe)
    Create a Set composed of the elements of the first Set minus the given element.
    Parameters:
      `self` - a Set object
      `removeMe` - the element to remove from the Set
    Returns:
      the resulting Set
    Since:
      1.5.0

  - ### minus

    public static <T> SortedSet<T> minus(SortedSet<T> self, Collection<?> removeMe)
    Create a SortedSet composed of the elements of the first SortedSet minus the elements of the given Collection.
    Parameters:
      `self` - a SortedSet object
      `removeMe` - the items to remove from the SortedSet
    Returns:
      the resulting SortedSet
    Since:
      2.4.0

  - ### minus

    public static <T> SortedSet<T> minus(SortedSet<T> self, Iterable<?> removeMe)
    Create a SortedSet composed of the elements of the first SortedSet minus the elements of the given Iterable.
    Parameters:
      `self` - a SortedSet object
      `removeMe` - the items to remove from the SortedSet
    Returns:
      the resulting SortedSet
    Since:
      2.4.0

  - ### minus

    public static <T> SortedSet<T> minus(SortedSet<T> self, Object removeMe)
    Create a SortedSet composed of the elements of the first SortedSet minus the given element.
    Parameters:
      `self` - a SortedSet object
      `removeMe` - the element to remove from the SortedSet
    Returns:
      the resulting SortedSet
    Since:
      2.4.0

  - ### minus

    public static <T> T[] minus(T[] self, Iterable removeMe)
    Create a new array composed of the elements of the first array minus the elements of the given Iterable.

         Integer[] ints = [1, 2, 3, 1]
         List<Integer> nope = [1, 3]
         def result = ints - nope
         assert result.class == Integer[]
         assert result == new Integer[]{2}

         Integer[] none = []
         result = none - 123
         assert result !== none
         assert result.length == 0
         assert result.class == Integer[]

    Parameters:
      `self` - an array
      `removeMe` - an Iterable of elements to remove
    Returns:
      an array with the supplied elements removed
    Since:
      1.5.5

  - ### minus

    public static <T> T[] minus(T[] self, Object[] removeMe)
    Create a new array composed of the elements of the first array minus the elements of the given array.

         Integer[] ints = [1, 2, 3, 1]
         Integer[] nope = [1, 3]
         def result = ints - nope
         assert result.class == Integer[]
         assert result == new Integer[]{2}

         Integer[] none = []
         result = none - 123
         assert result !== none
         assert result.length == 0
         assert result.class == Integer[]

    Parameters:
      `self` - an array
      `removeMe` - an array of elements to remove
    Returns:
      an array with the supplied elements removed
    Since:
      1.5.5

  - ### minus

    public static <T> List<T> minus(List<T> self, Collection<?> removeMe)
    Create a List composed of the elements of the first list minus every occurrence of elements of the given Collection.

        assert [1, "a", true, true, false, 5.3] - [true, 5.3] == [1, "a", false]

    Parameters:
      `self` - a List
      `removeMe` - a Collection of elements to remove
    Returns:
      a List with the given elements removed
    Since:
      1.0

  - ### minus

    public static <T> Collection<T> minus(Collection<T> self, Collection<?> removeMe)
    Create a new Collection composed of the elements of the first Collection minus every occurrence of elements of the given Collection.

        assert [1, "a", true, true, false, 5.3] - [true, 5.3] == [1, "a", false]

    Parameters:
      `self` - a Collection
      `removeMe` - a Collection of elements to remove
    Returns:
      a Collection with the given elements removed
    Since:
      2.4.0

  - ### minus

    public static <T> List<T> minus(List<T> self, Iterable<?> removeMe)
    Create a new List composed of the elements of the first List minus every occurrence of elements of the given Iterable.

        assert [1, "a", true, true, false, 5.3] - [true, 5.3] == [1, "a", false]

    Parameters:
      `self` - a List
      `removeMe` - an Iterable of elements to remove
    Returns:
      a new List with the given elements removed
    Since:
      1.8.7

  - ### minus

    public static <T> Collection<T> minus(Iterable<T> self, Iterable<?> removeMe)
    Create a new Collection composed of the elements of the first Iterable minus every occurrence of elements of the given Iterable.

         assert [1, "a", true, true, false, 5.3] - [true, 5.3] == [1, "a", false]

    Parameters:
      `self` - an Iterable
      `removeMe` - an Iterable of elements to remove
    Returns:
      a new Collection with the given elements removed
    Since:
      2.4.0

  - ### minus

    public static <T> Collection<T> minus(Iterable<T> self, Iterable<?> removeMe, Closure condition)
    Create a new Collection composed of the elements of the first Iterable minus every matching occurrence as determined by the condition closure of elements of the given Iterable.

         assert ['a', 'B', 'c', 'D', 'E'].minus(['b', 'C', 'D']) { it.toLowerCase() } == ['a', 'E']

    Parameters:
      `self` - an Iterable
      `removeMe` - an Iterable of elements to remove
      `condition` - a Closure used to determine unique items
    Returns:
      a new Collection with the given elements removed
    Since:
      4.0.0

  - ### minus

    public static <T> Collection<T> minus(Iterable<T> self, Iterable<?> removeMe, Comparator<? super T> comparator)
    Create a new Collection composed of the elements of the first Iterable minus every matching occurrence as determined by the condition comparator of elements of the given Iterable.

         assert ['a', 'B', 'c', 'D', 'E'].minus(['b', 'C', 'D'], (i, j) -> i.toLowerCase() <=> j.toLowerCase()) == ['a', 'E']

    Parameters:
      `self` - an Iterable
      `removeMe` - an Iterable of elements to remove
      `comparator` - a Comparator
    Returns:
      a new Collection with the given elements removed
    Since:
      4.0.0

  - ### minus

    public static <T> List<T> minus(List<T> self, Object removeMe)
    Create a new List composed of the elements of the first List minus every occurrence of the given element to remove.

        assert ["a", 5, 5, true] - 5 == ["a", true]

    Parameters:
      `self` - a List object
      `removeMe` - an element to remove from the List
    Returns:
      the resulting List with the given element removed
    Since:
      1.0

  - ### minus

    public static <T> Collection<T> minus(Iterable<T> self, Object removeMe)
    Create a new Collection composed of the elements of the first Iterable minus every occurrence of the given element to remove.

        assert ["a", 5, 5, true] - 5 == ["a", true]

    Parameters:
      `self` - an Iterable object
      `removeMe` - an element to remove from the Iterable
    Returns:
      the resulting Collection with the given element removed
    Since:
      2.4.0

  - ### minus

    public static <T> T[] minus(T[] self, Object removeMe)
    Create a new array composed of the elements of the given array minus every occurrence the given object.

         Integer[] ints = [1, 2, 3, 1]
         def result = ints - 1
         assert result.class == Integer[]
         assert result == new Integer[]{2, 3}

         Integer[] none = []
         result = none - '1'
         assert result !== none
         assert result.length == 0
         assert result.class == Integer[]

    Parameters:
      `self` - an array
      `removeMe` - an element to remove from the array
    Returns:
      a new array with the operand removed
    Since:
      1.5.5

  - ### minus

    public static <K, V> Map<K,V> minus(Map<K,V> self, Map removeMe)
    Create a Map composed of the entries of the first map minus the entries of the given map.
    Parameters:
      `self` - a map object
      `removeMe` - the entries to remove from the map
    Returns:
      the resulting map
    Since:
      1.7.4

  - ### flatten

    public static Collection<?> flatten(Collection<?> self)
    Flatten a Collection. This Collection and any nested arrays or collections have their contents (recursively) added to the new collection.

        assert [1,2,3,4,5] == [1,[2,3],[[4]],[],5].flatten()

    Parameters:
      `self` - a Collection to flatten
    Returns:
      a flattened Collection
    Since:
      1.6.0

  - ### flatten

    public static Collection<?> flatten(Iterable<?> self)
    Flatten an Iterable. This Iterable and any nested arrays or collections have their contents (recursively) added to the new collection.

        assert [1,2,3,4,5] == [1,[2,3],[[4]],[],5].flatten()

    Parameters:
      `self` - an Iterable to flatten
    Returns:
      a flattened Collection
    Since:
      1.6.0

  - ### flatten

    public static List<?> flatten(List<?> self)
    Flatten a List. This List and any nested arrays or collections have their contents (recursively) added to the new List.

        assert [1,2,3,4,5] == [1,[2,3],[[4]],[],5].flatten()

    Parameters:
      `self` - a List to flatten
    Returns:
      a flattened List
    Since:
      2.4.0

  - ### flatten

    public static Set<?> flatten(Set<?> self)
    Flatten a Set. This Set and any nested arrays or collections have their contents (recursively) added to the new Set.

        assert [1,2,3,4,5] as Set == ([1,[2,3],[[4]],[],5] as Set).flatten()

    Parameters:
      `self` - a Set to flatten
    Returns:
      a flattened Set
    Since:
      2.4.0

  - ### flatten

    public static SortedSet<?> flatten(SortedSet<?> self)
    Flatten a SortedSet. This SortedSet and any nested arrays or collections have their contents (recursively) added to the new SortedSet.

         Set nested = [[0,1],[2],3,[4],5]
         SortedSet sorted = new TreeSet({ a, b -> (a instanceof List ? a[0] : a) <=> (b instanceof List ? b[0] : b) } as Comparator)
         sorted.addAll(nested)
         assert [0,1,2,3,4,5] as SortedSet == sorted.flatten()

    Parameters:
      `self` - a SortedSet to flatten
    Returns:
      a flattened SortedSet
    Since:
      2.4.0

  - ### flatten

    public static Collection flatten(Object[] self)
    Flatten an array. This array and any nested arrays or collections have their contents (recursively) added to the new collection.
    Parameters:
      `self` - an Array to flatten
    Returns:
      a flattened Collection
    Since:
      1.6.0

  - ### flatten

    public static Collection flatten(boolean[] self)
    Flatten an array. This array and any nested arrays or collections have their contents (recursively) added to the new collection.
    Parameters:
      `self` - a boolean Array to flatten
    Returns:
      a flattened Collection
    Since:
      1.6.0

  - ### flatten

    public static Collection flatten(byte[] self)
    Flatten an array. This array and any nested arrays or collections have their contents (recursively) added to the new collection.
    Parameters:
      `self` - a byte Array to flatten
    Returns:
      a flattened Collection
    Since:
      1.6.0

  - ### flatten

    public static Collection flatten(char[] self)
    Flatten an array. This array and any nested arrays or collections have their contents (recursively) added to the new collection.
    Parameters:
      `self` - a char Array to flatten
    Returns:
      a flattened Collection
    Since:
      1.6.0

  - ### flatten

    public static Collection flatten(short[] self)
    Flatten an array. This array and any nested arrays or collections have their contents (recursively) added to the new collection.
    Parameters:
      `self` - a short Array to flatten
    Returns:
      a flattened Collection
    Since:
      1.6.0

  - ### flatten

    public static Collection flatten(int[] self)
    Flatten an array. This array and any nested arrays or collections have their contents (recursively) added to the new collection.
    Parameters:
      `self` - an int Array to flatten
    Returns:
      a flattened Collection
    Since:
      1.6.0

  - ### flatten

    public static Collection flatten(long[] self)
    Flatten an array. This array and any nested arrays or collections have their contents (recursively) added to the new collection.
    Parameters:
      `self` - a long Array to flatten
    Returns:
      a flattened Collection
    Since:
      1.6.0

  - ### flatten

    public static Collection flatten(float[] self)
    Flatten an array. This array and any nested arrays or collections have their contents (recursively) added to the new collection.
    Parameters:
      `self` - a float Array to flatten
    Returns:
      a flattened Collection
    Since:
      1.6.0

  - ### flatten

    public static Collection flatten(double[] self)
    Flatten an array. This array and any nested arrays or collections have their contents (recursively) added to the new collection.
    Parameters:
      `self` - a double Array to flatten
    Returns:
      a flattened Collection
    Since:
      1.6.0

  - ### flatten

    public static <T> Collection<T> flatten(Iterable<T> self, Closure<? extends T> flattenUsing)
    Flatten an Iterable. This Iterable and any nested arrays or collections have their contents (recursively) added to the new collection. For any non-Array, non-Collection object which represents some sort of collective type, the supplied closure should yield the contained items; otherwise, the closure should just return any element which corresponds to a leaf.
    Parameters:
      `self` - an Iterable
      `flattenUsing` - a closure to determine how to flatten non-Array, non-Collection elements
    Returns:
      a flattened Collection
    Since:
      1.6.0

  - ### leftShift

    public static <T> Collection<T> leftShift(Collection<T> self, T value)
    Overloads the left shift operator to provide an easy way to append objects to a Collection.

        def list = [1,2]
         list << 3
         assert list == [1,2,3]

    Parameters:
      `self` - a Collection
      `value` - an Object to be added to the collection.
    Returns:
      same collection, after the value was added to it.
    Since:
      1.0

  - ### leftShift

    public static <T> List<T> leftShift(List<T> self, T value)
    Overloads the left shift operator to provide an easy way to append objects to a List.

        def list = [1,2]
         list << 3
         assert list == [1,2,3]

    Parameters:
      `self` - a List
      `value` - an Object to be added to the List.
    Returns:
      same List, after the value was added to it.
    Since:
      2.4.0

  - ### leftShift

    public static <T> Set<T> leftShift(Set<T> self, T value)
    Overloads the left shift operator to provide an easy way to append objects to a Set.

        def set = [1,2] as Set
         set << 3
         assert set == [1,2,3] as Set

    Parameters:
      `self` - a Set
      `value` - an Object to be added to the Set.
    Returns:
      same Set, after the value was added to it.
    Since:
      2.4.0

  - ### leftShift

    public static <T> SortedSet<T> leftShift(SortedSet<T> self, T value)
    Overloads the left shift operator to provide an easy way to append objects to a SortedSet.

        def set = [1,2] as SortedSet
         set << 3
         assert set == [1,2,3] as SortedSet

    Parameters:
      `self` - a SortedSet
      `value` - an Object to be added to the SortedSet.
    Returns:
      same SortedSet, after the value was added to it.
    Since:
      2.4.0

  - ### leftShift

    public static <T> BlockingQueue<T> leftShift(BlockingQueue<T> self, T value) throws InterruptedException
    Overloads the left shift operator to provide an easy way to append objects to a BlockingQueue. In case of bounded queue the method will block till space in the queue become available

        def list = new java.util.concurrent.LinkedBlockingQueue ()
         list << 3 << 2 << 1
         assert list.iterator().collect{it} == [3,2,1]

    Parameters:
      `self` - a Collection
      `value` - an Object to be added to the collection.
    Returns:
      same collection, after the value was added to it.
    Throws:
      `InterruptedException`
    Since:
      1.7.1

  - ### leftShift

    public static <K, V> Map<K,V> leftShift(Map<K,V> self, Map.Entry<K,V> entry)
    Overloads the left shift operator to provide an easy way to append Map.Entry values to a Map.
    Parameters:
      `self` - a Map
      `entry` - a Map.Entry to be added to the Map.
    Returns:
      same map, after the value has been added to it.
    Since:
      1.6.0

  - ### leftShift

    public static <K, V> Map<K,V> leftShift(Map<K,V> self, Map<K,V> other)
    Overloads the left shift operator to provide an easy way to put one maps entries into another map. This allows the compact syntax `map1 << map2`; otherwise it's just a synonym for `putAll` though it returns the original map rather than being a `void` method. Example usage:

        def map = [a:1, b:2]
         map << [c:3, d:4]
         assert map == [a:1, b:2, c:3, d:4]

    Parameters:
      `self` - a Map
      `other` - another Map whose entries should be added to the original Map.
    Returns:
      same map, after the values have been added to it.
    Since:
      1.7.2

  - ### leftShift

    public static Number leftShift(Number self, Number operand)
    Implementation of the left shift operator for integral types. Non-integral Number types throw UnsupportedOperationException.
    Parameters:
      `self` - a Number object
      `operand` - the shift distance by which to left shift the number
    Returns:
      the resulting number
    Since:
      1.5.0

  - ### rightShift

    public static Number rightShift(Number self, Number operand)
    Implementation of the right shift operator for integral types. Non-integral Number types throw UnsupportedOperationException.
    Parameters:
      `self` - a Number object
      `operand` - the shift distance by which to right shift the number
    Returns:
      the resulting number
    Since:
      1.5.0

  - ### rightShiftUnsigned

    public static Number rightShiftUnsigned(Number self, Number operand)
    Implementation of the right shift (unsigned) operator for integral types. Non-integral Number types throw UnsupportedOperationException.
    Parameters:
      `self` - a Number object
      `operand` - the shift distance by which to right shift (unsigned) the number
    Returns:
      the resulting number
    Since:
      1.5.0

  - ### getAt

    public static List<Byte> getAt(byte[] array, Range range)
    Support the subscript operator with a range for a byte array
    Parameters:
      `array` - a byte array
      `range` - a range indicating the indices for the items to retrieve
    Returns:
      list of the retrieved bytes
    Since:
      1.0

  - ### getAt

    public static List<Character> getAt(char[] array, Range range)
    Support the subscript operator with a range for a char array
    Parameters:
      `array` - a char array
      `range` - a range indicating the indices for the items to retrieve
    Returns:
      list of the retrieved chars
    Since:
      1.5.0

  - ### getAt

    public static List<Short> getAt(short[] array, Range range)
    Support the subscript operator with a range for a short array
    Parameters:
      `array` - a short array
      `range` - a range indicating the indices for the items to retrieve
    Returns:
      list of the retrieved shorts
    Since:
      1.0

  - ### getAt

    public static List<Integer> getAt(int[] array, Range range)
    Support the subscript operator with a range for an int array
    Parameters:
      `array` - an int array
      `range` - a range indicating the indices for the items to retrieve
    Returns:
      list of the ints at the given indices
    Since:
      1.0

  - ### getAt

    public static List<Long> getAt(long[] array, Range range)
    Support the subscript operator with a range for a long array
    Parameters:
      `array` - a long array
      `range` - a range indicating the indices for the items to retrieve
    Returns:
      list of the retrieved longs
    Since:
      1.0

  - ### getAt

    public static List<Float> getAt(float[] array, Range range)
    Support the subscript operator with a range for a float array
    Parameters:
      `array` - a float array
      `range` - a range indicating the indices for the items to retrieve
    Returns:
      list of the retrieved floats
    Since:
      1.0

  - ### getAt

    public static List<Double> getAt(double[] array, Range range)
    Support the subscript operator with a range for a double array
    Parameters:
      `array` - a double array
      `range` - a range indicating the indices for the items to retrieve
    Returns:
      list of the retrieved doubles
    Since:
      1.0

  - ### getAt

    public static List<Boolean> getAt(boolean[] array, Range range)
    Support the subscript operator with a range for a boolean array
    Parameters:
      `array` - a boolean array
      `range` - a range indicating the indices for the items to retrieve
    Returns:
      list of the retrieved booleans
    Since:
      1.0

  - ### getAt

    public static List<Byte> getAt(byte[] array, IntRange range)
    Support the subscript operator with an IntRange for a byte array
    Parameters:
      `array` - a byte array
      `range` - an IntRange indicating the indices for the items to retrieve
    Returns:
      list of the retrieved bytes
    Since:
      1.0

  - ### getAt

    public static List<Character> getAt(char[] array, IntRange range)
    Support the subscript operator with an IntRange for a char array
    Parameters:
      `array` - a char array
      `range` - an IntRange indicating the indices for the items to retrieve
    Returns:
      list of the retrieved chars
    Since:
      1.0

  - ### getAt

    public static List<Short> getAt(short[] array, IntRange range)
    Support the subscript operator with an IntRange for a short array
    Parameters:
      `array` - a short array
      `range` - an IntRange indicating the indices for the items to retrieve
    Returns:
      list of the retrieved shorts
    Since:
      1.0

  - ### getAt

    public static List<Integer> getAt(int[] array, IntRange range)
    Support the subscript operator with an IntRange for an int array
    Parameters:
      `array` - an int array
      `range` - an IntRange indicating the indices for the items to retrieve
    Returns:
      list of the retrieved ints
    Since:
      1.0

  - ### getAt

    public static List<Long> getAt(long[] array, IntRange range)
    Support the subscript operator with an IntRange for a long array
    Parameters:
      `array` - a long array
      `range` - an IntRange indicating the indices for the items to retrieve
    Returns:
      list of the retrieved longs
    Since:
      1.0

  - ### getAt

    public static List<Float> getAt(float[] array, IntRange range)
    Support the subscript operator with an IntRange for a float array
    Parameters:
      `array` - a float array
      `range` - an IntRange indicating the indices for the items to retrieve
    Returns:
      list of the retrieved floats
    Since:
      1.0

  - ### getAt

    public static List<Double> getAt(double[] array, IntRange range)
    Support the subscript operator with an IntRange for a double array
    Parameters:
      `array` - a double array
      `range` - an IntRange indicating the indices for the items to retrieve
    Returns:
      list of the retrieved doubles
    Since:
      1.0

  - ### getAt

    public static List<Boolean> getAt(boolean[] array, IntRange range)
    Support the subscript operator with an IntRange for a boolean array
    Parameters:
      `array` - a boolean array
      `range` - an IntRange indicating the indices for the items to retrieve
    Returns:
      list of the retrieved booleans
    Since:
      1.0

  - ### getAt

    public static List<Byte> getAt(byte[] array, ObjectRange range)
    Support the subscript operator with an ObjectRange for a byte array
    Parameters:
      `array` - a byte array
      `range` - an ObjectRange indicating the indices for the items to retrieve
    Returns:
      list of the retrieved bytes
    Since:
      1.0

  - ### getAt

    public static List<Character> getAt(char[] array, ObjectRange range)
    Support the subscript operator with an ObjectRange for a char array
    Parameters:
      `array` - a char array
      `range` - an ObjectRange indicating the indices for the items to retrieve
    Returns:
      list of the retrieved chars
    Since:
      1.0

  - ### getAt

    public static List<Short> getAt(short[] array, ObjectRange range)
    Support the subscript operator with an ObjectRange for a short array
    Parameters:
      `array` - a short array
      `range` - an ObjectRange indicating the indices for the items to retrieve
    Returns:
      list of the retrieved shorts
    Since:
      1.0

  - ### getAt

    public static List<Integer> getAt(int[] array, ObjectRange range)
    Support the subscript operator with an ObjectRange for an int array
    Parameters:
      `array` - an int array
      `range` - an ObjectRange indicating the indices for the items to retrieve
    Returns:
      list of the retrieved ints
    Since:
      1.0

  - ### getAt

    public static List<Long> getAt(long[] array, ObjectRange range)
    Support the subscript operator with an ObjectRange for a long array
    Parameters:
      `array` - a long array
      `range` - an ObjectRange indicating the indices for the items to retrieve
    Returns:
      list of the retrieved longs
    Since:
      1.0

  - ### getAt

    public static List<Float> getAt(float[] array, ObjectRange range)
    Support the subscript operator with an ObjectRange for a float array
    Parameters:
      `array` - a float array
      `range` - an ObjectRange indicating the indices for the items to retrieve
    Returns:
      list of the retrieved floats
    Since:
      1.0

  - ### getAt

    public static List<Double> getAt(double[] array, ObjectRange range)
    Support the subscript operator with an ObjectRange for a double array
    Parameters:
      `array` - a double array
      `range` - an ObjectRange indicating the indices for the items to retrieve
    Returns:
      list of the retrieved doubles
    Since:
      1.0

  - ### getAt

    public static List<Boolean> getAt(boolean[] array, ObjectRange range)
    Support the subscript operator with an ObjectRange for a byte array
    Parameters:
      `array` - a byte array
      `range` - an ObjectRange indicating the indices for the items to retrieve
    Returns:
      list of the retrieved bytes
    Since:
      1.0

  - ### getAt

    public static List<Byte> getAt(byte[] array, Collection indices)
    Support the subscript operator with a collection for a byte array
    Parameters:
      `array` - a byte array
      `indices` - a collection of indices for the items to retrieve
    Returns:
      list of the bytes at the given indices
    Since:
      1.0

  - ### getAt

    public static List<Character> getAt(char[] array, Collection indices)
    Support the subscript operator with a collection for a char array
    Parameters:
      `array` - a char array
      `indices` - a collection of indices for the items to retrieve
    Returns:
      list of the chars at the given indices
    Since:
      1.0

  - ### getAt

    public static List<Short> getAt(short[] array, Collection indices)
    Support the subscript operator with a collection for a short array
    Parameters:
      `array` - a short array
      `indices` - a collection of indices for the items to retrieve
    Returns:
      list of the shorts at the given indices
    Since:
      1.0

  - ### getAt

    public static List<Integer> getAt(int[] array, Collection indices)
    Support the subscript operator with a collection for an int array
    Parameters:
      `array` - an int array
      `indices` - a collection of indices for the items to retrieve
    Returns:
      list of the ints at the given indices
    Since:
      1.0

  - ### getAt

    public static List<Long> getAt(long[] array, Collection indices)
    Support the subscript operator with a collection for a long array
    Parameters:
      `array` - a long array
      `indices` - a collection of indices for the items to retrieve
    Returns:
      list of the longs at the given indices
    Since:
      1.0

  - ### getAt

    public static List<Float> getAt(float[] array, Collection indices)
    Support the subscript operator with a collection for a float array
    Parameters:
      `array` - a float array
      `indices` - a collection of indices for the items to retrieve
    Returns:
      list of the floats at the given indices
    Since:
      1.0

  - ### getAt

    public static List<Double> getAt(double[] array, Collection indices)
    Support the subscript operator with a collection for a double array
    Parameters:
      `array` - a double array
      `indices` - a collection of indices for the items to retrieve
    Returns:
      list of the doubles at the given indices
    Since:
      1.0

  - ### getAt

    public static List<Boolean> getAt(boolean[] array, Collection indices)
    Support the subscript operator with a collection for a boolean array
    Parameters:
      `array` - a boolean array
      `indices` - a collection of indices for the items to retrieve
    Returns:
      list of the booleans at the given indices
    Since:
      1.0

  - ### getAt

    public static boolean getAt(BitSet self, int index)
    Support the subscript operator for a Bitset
    Parameters:
      `self` - a BitSet
      `index` - index to retrieve
    Returns:
      value of the bit at the given index
    Since:
      1.5.0
    See Also:
      - `BitSet`

  - ### getAt

    public static BitSet getAt(BitSet self, IntRange range)
    Support retrieving a subset of a BitSet using a Range
    Parameters:
      `self` - a BitSet
      `range` - a Range defining the desired subset
    Returns:
      a new BitSet that represents the requested subset
    Since:
      1.5.0
    See Also:
      - `BitSet`
      - `IntRange`

  - ### putAt

    public static void putAt(BitSet self, IntRange range, boolean value)
    Support assigning a range of values with a single assignment statement.
    Parameters:
      `self` - a BitSet
      `range` - the range of values to set
      `value` - value
    Since:
      1.5.0
    See Also:
      - `BitSet`
      - `Range`

  - ### putAt

    public static void putAt(BitSet self, int index, boolean value)
    Support subscript-style assignment for a BitSet.
    Parameters:
      `self` - a BitSet
      `index` - index of the entry to set
      `value` - value
    Since:
      1.5.0
    See Also:
      - `BitSet`

  - ### size

    public static int size(boolean[] array)
    Allows arrays to behave similar to collections.
    Parameters:
      `array` - a boolean array
    Returns:
      the length of the array
    Since:
      1.5.0
    See Also:
      - `Array.getLength(java.lang.Object)`

  - ### size

    public static int size(byte[] array)
    Allows arrays to behave similar to collections.
    Parameters:
      `array` - a byte array
    Returns:
      the length of the array
    Since:
      1.0
    See Also:
      - `Array.getLength(java.lang.Object)`

  - ### size

    public static int size(char[] array)
    Allows arrays to behave similar to collections.
    Parameters:
      `array` - a char array
    Returns:
      the length of the array
    Since:
      1.0
    See Also:
      - `Array.getLength(java.lang.Object)`

  - ### size

    public static int size(short[] array)
    Allows arrays to behave similar to collections.
    Parameters:
      `array` - a short array
    Returns:
      the length of the array
    Since:
      1.0
    See Also:
      - `Array.getLength(java.lang.Object)`

  - ### size

    public static int size(int[] array)
    Allows arrays to behave similar to collections.
    Parameters:
      `array` - an int array
    Returns:
      the length of the array
    Since:
      1.0
    See Also:
      - `Array.getLength(java.lang.Object)`

  - ### size

    public static int size(long[] array)
    Allows arrays to behave similar to collections.
    Parameters:
      `array` - a long array
    Returns:
      the length of the array
    Since:
      1.0
    See Also:
      - `Array.getLength(java.lang.Object)`

  - ### size

    public static int size(float[] array)
    Allows arrays to behave similar to collections.
    Parameters:
      `array` - a float array
    Returns:
      the length of the array
    Since:
      1.0
    See Also:
      - `Array.getLength(java.lang.Object)`

  - ### size

    public static int size(double[] array)
    Allows arrays to behave similar to collections.
    Parameters:
      `array` - a double array
    Returns:
      the length of the array
    Since:
      1.0
    See Also:
      - `Array.getLength(java.lang.Object)`

  - ### toList

    public static List<Byte> toList(byte[] array)
    Converts this array to a List of the same size, with each element added to the list.
    Parameters:
      `array` - a byte array
    Returns:
      a list containing the contents of this array.
    Since:
      1.0

  - ### toList

    public static List<Boolean> toList(boolean[] array)
    Converts this array to a List of the same size, with each element added to the list.
    Parameters:
      `array` - a boolean array
    Returns:
      a list containing the contents of this array.
    Since:
      1.6.0

  - ### toList

    public static List<Character> toList(char[] array)
    Converts this array to a List of the same size, with each element added to the list.
    Parameters:
      `array` - a char array
    Returns:
      a list containing the contents of this array.
    Since:
      1.0

  - ### toList

    public static List<Short> toList(short[] array)
    Converts this array to a List of the same size, with each element added to the list.
    Parameters:
      `array` - a short array
    Returns:
      a list containing the contents of this array.
    Since:
      1.0

  - ### toList

    public static List<Integer> toList(int[] array)
    Converts this array to a List of the same size, with each element added to the list.
    Parameters:
      `array` - an int array
    Returns:
      a list containing the contents of this array.
    Since:
      1.0

  - ### toList

    public static List<Long> toList(long[] array)
    Converts this array to a List of the same size, with each element added to the list.
    Parameters:
      `array` - a long array
    Returns:
      a list containing the contents of this array.
    Since:
      1.0

  - ### toList

    public static List<Float> toList(float[] array)
    Converts this array to a List of the same size, with each element added to the list.
    Parameters:
      `array` - a float array
    Returns:
      a list containing the contents of this array.
    Since:
      1.0

  - ### toList

    public static List<Double> toList(double[] array)
    Converts this array to a List of the same size, with each element added to the list.
    Parameters:
      `array` - a double array
    Returns:
      a list containing the contents of this array.
    Since:
      1.0

  - ### toSet

    public static Set<Byte> toSet(byte[] array)
    Converts this array to a Set, with each unique element added to the set.
    Parameters:
      `array` - a byte array
    Returns:
      a set containing the unique contents of this array.
    Since:
      1.8.0

  - ### toSet

    public static Set<Boolean> toSet(boolean[] array)
    Converts this array to a Set, with each unique element added to the set.
    Parameters:
      `array` - a boolean array
    Returns:
      a set containing the unique contents of this array.
    Since:
      1.8.0

  - ### toSet

    public static Set<Character> toSet(char[] array)
    Converts this array to a Set, with each unique element added to the set.
    Parameters:
      `array` - a char array
    Returns:
      a set containing the unique contents of this array.
    Since:
      1.8.0

  - ### toSet

    public static Set<Short> toSet(short[] array)
    Converts this array to a Set, with each unique element added to the set.
    Parameters:
      `array` - a short array
    Returns:
      a set containing the unique contents of this array.
    Since:
      1.8.0

  - ### toSet

    public static Set<Integer> toSet(int[] array)
    Converts this array to a Set, with each unique element added to the set.
    Parameters:
      `array` - an int array
    Returns:
      a set containing the unique contents of this array.
    Since:
      1.8.0

  - ### toSet

    public static Set<Long> toSet(long[] array)
    Converts this array to a Set, with each unique element added to the set.
    Parameters:
      `array` - a long array
    Returns:
      a set containing the unique contents of this array.
    Since:
      1.8.0

  - ### toSet

    public static Set<Float> toSet(float[] array)
    Converts this array to a Set, with each unique element added to the set.
    Parameters:
      `array` - a float array
    Returns:
      a set containing the unique contents of this array.
    Since:
      1.8.0

  - ### toSet

    public static Set<Double> toSet(double[] array)
    Converts this array to a Set, with each unique element added to the set.
    Parameters:
      `array` - a double array
    Returns:
      a set containing the unique contents of this array.
    Since:
      1.8.0

  - ### toSet

    public static <T> Set<T> toSet(Collection<T> self)
    Convert a Collection to a Set. Always returns a new Set even if the Collection is already a Set.

    Example usage:

         def result = [1, 2, 2, 2, 3].toSet()
         assert result instanceof Set
         assert result == [1, 2, 3] as Set

    Parameters:
      `self` - a collection
    Returns:
      a Set
    Since:
      1.8.0

  - ### toSet

    public static <T> Set<T> toSet(Iterable<T> self)
    Convert an Iterable to a Set. Always returns a new Set even if the Iterable is already a Set.

    Example usage:

         def result = [1, 2, 2, 2, 3].toSet()
         assert result instanceof Set
         assert result == [1, 2, 3] as Set

    Parameters:
      `self` - an Iterable
    Returns:
      a Set
    Since:
      2.4.0

  - ### toSet

    public static <T> Set<T> toSet(Iterator<T> self)
    Convert an iterator to a Set. The iterator will become exhausted of elements after making this conversion.
    Parameters:
      `self` - an iterator
    Returns:
      a Set
    Since:
      1.8.0

  - ### toSet

    public static <T> Set<T> toSet(Enumeration<T> self)
    Convert an enumeration to a Set.
    Parameters:
      `self` - an enumeration
    Returns:
      a Set
    Since:
      1.8.0

  - ### primitiveArrayGet

    protected static Object primitiveArrayGet(Object self, int idx)
    Implements the getAt(int) method for primitive type arrays.
    Parameters:
      `self` - an array object
      `idx` - the index of interest
    Returns:
      the returned value from the array
    Since:
      1.5.0

  - ### primitiveArrayGet

    protected static List primitiveArrayGet(Object self, Range range)
    Implements the getAt(Range) method for primitive type arrays.
    Parameters:
      `self` - an array object
      `range` - the range of indices of interest
    Returns:
      the returned values from the array corresponding to the range
    Since:
      1.5.0

  - ### primitiveArrayGet

    protected static List primitiveArrayGet(Object self, Collection indices)
    Implements the getAt(Collection) method for primitive type arrays. Each value in the collection argument is assumed to be a valid array index. The value at each index is then added to a list which is returned.
    Parameters:
      `self` - an array object
      `indices` - the indices of interest
    Returns:
      the returned values from the array
    Since:
      1.0

  - ### primitiveArrayPut

    protected static Object primitiveArrayPut(Object self, int idx, Object newValue)
    Implements the setAt(int idx) method for primitive type arrays.
    Parameters:
      `self` - an object
      `idx` - the index of interest
      `newValue` - the new value to be put into the index of interest
    Returns:
      the added value
    Since:
      1.5.0

  - ### toBoolean

    public static Boolean toBoolean(Boolean self)
    Identity conversion which returns Boolean.TRUE for a true Boolean and Boolean.FALSE for a false Boolean.
    Parameters:
      `self` - a Boolean
    Returns:
      the original Boolean
    Since:
      1.7.6

  - ### contains

    public static boolean contains(int[] self, Object value)
    Checks whether the array contains the given value.
    Parameters:
      `self` - the array we are searching
      `value` - the value being searched for
    Returns:
      true if the array contains the value
    Since:
      1.8.6

  - ### contains

    public static boolean contains(long[] self, Object value)
    Checks whether the array contains the given value.
    Parameters:
      `self` - the array we are searching
      `value` - the value being searched for
    Returns:
      true if the array contains the value
    Since:
      1.8.6

  - ### contains

    public static boolean contains(short[] self, Object value)
    Checks whether the array contains the given value.
    Parameters:
      `self` - the array we are searching
      `value` - the value being searched for
    Returns:
      true if the array contains the value
    Since:
      1.8.6

  - ### contains

    public static boolean contains(char[] self, Object value)
    Checks whether the array contains the given value.
    Parameters:
      `self` - the array we are searching
      `value` - the value being searched for
    Returns:
      true if the array contains the value
    Since:
      1.8.6

  - ### contains

    public static boolean contains(boolean[] self, Object value)
    Checks whether the array contains the given value.
    Parameters:
      `self` - the array within which we count the number of occurrences
      `value` - the value being searched for
    Returns:
      the number of occurrences
    Since:
      1.8.6

  - ### contains

    public static boolean contains(double[] self, Object value)
    Checks whether the array contains the given value.
    Parameters:
      `self` - the array we are searching
      `value` - the value being searched for
    Returns:
      true if the array contains the value
    Since:
      1.8.6

  - ### contains

    public static boolean contains(float[] self, Object value)
    Checks whether the array contains the given value.
    Parameters:
      `self` - the array we are searching
      `value` - the value being searched for
    Returns:
      true if the array contains the value
    Since:
      1.8.6

  - ### contains

    public static boolean contains(byte[] self, Object value)
    Checks whether the array contains the given value.
    Parameters:
      `self` - the array we are searching
      `value` - the value being searched for
    Returns:
      true if the array contains the value
    Since:
      1.8.6

  - ### contains

    public static boolean contains(Object[] self, Object value)
    Checks whether the array contains the given value.
    Parameters:
      `self` - the array we are searching
      `value` - the value being searched for
    Returns:
      true if the array contains the value
    Since:
      1.8.6

  - ### toString

    public static String toString(boolean[] self)
    Returns the string representation of the given array.
    Parameters:
      `self` - an array
    Returns:
      the string representation
    Since:
      1.6.0

  - ### toString

    public static String toString(byte[] self)
    Returns the string representation of the given array.
    Parameters:
      `self` - an array
    Returns:
      the string representation
    Since:
      1.6.0

  - ### toString

    public static String toString(char[] self)
    Returns the string representation of the given array.
    Parameters:
      `self` - an array
    Returns:
      the string representation
    Since:
      1.6.0

  - ### toString

    public static String toString(short[] self)
    Returns the string representation of the given array.
    Parameters:
      `self` - an array
    Returns:
      the string representation
    Since:
      1.6.0

  - ### toString

    public static String toString(int[] self)
    Returns the string representation of the given array.
    Parameters:
      `self` - an array
    Returns:
      the string representation
    Since:
      1.6.0

  - ### toString

    public static String toString(long[] self)
    Returns the string representation of the given array.
    Parameters:
      `self` - an array
    Returns:
      the string representation
    Since:
      1.6.0

  - ### toString

    public static String toString(float[] self)
    Returns the string representation of the given array.
    Parameters:
      `self` - an array
    Returns:
      the string representation
    Since:
      1.6.0

  - ### toString

    public static String toString(double[] self)
    Returns the string representation of the given array.
    Parameters:
      `self` - an array
    Returns:
      the string representation
    Since:
      1.6.0

  - ### toString

    public static String toString(AbstractMap self)
    Returns the string representation of the given map.
    Parameters:
      `self` - a Map
    Returns:
      the string representation
    Since:
      1.0
    See Also:
      - `toMapString(java.util.Map)`

  - ### toMapString

    public static String toMapString(Map self)
    Returns the string representation of this map. The string displays the contents of the map, i.e. `[one:1, two:2, three:3]`.
    Parameters:
      `self` - a Map
    Returns:
      the string representation
    Since:
      1.0

  - ### toMapString

    public static String toMapString(Map self, int maxSize)
    Returns the string representation of this map. The string displays the contents of the map, i.e. `[one:1, two:2, three:3]`.
    Parameters:
      `self` - a Map
      `maxSize` - stop after approximately this many characters and append '...'
    Returns:
      the string representation
    Since:
      1.0

  - ### toString

    public static String toString(AbstractCollection self)
    Returns the string representation of the given collection. The string displays the contents of the collection, i.e. `[1, 2, a]`.
    Parameters:
      `self` - a Collection
    Returns:
      the string representation
    Since:
      1.0
    See Also:
      - `toListString(java.util.Collection)`

  - ### toListString

    public static String toListString(Collection self)
    Returns the string representation of the given list. The string displays the contents of the list, similar to a list literal, i.e. `[1, 2, a]`.
    Parameters:
      `self` - a Collection
    Returns:
      the string representation
    Since:
      1.0

  - ### toListString

    public static String toListString(Collection self, int maxSize)
    Returns the string representation of the given list. The string displays the contents of the list, similar to a list literal, i.e. `[1, 2, a]`.
    Parameters:
      `self` - a Collection
      `maxSize` - stop after approximately this many characters and append '...'
    Returns:
      the string representation
    Since:
      1.7.3

  - ### toString

    public static String toString(Object[] self)
    Returns the string representation of this array's contents.
    Parameters:
      `self` - an Object[]
    Returns:
      the string representation
    Since:
      1.0
    See Also:
      - `toArrayString(java.lang.Object[])`

  - ### toArrayString

    public static String toArrayString(Object[] self)
    Returns the string representation of the given array. The string displays the contents of the array, similar to an array literal, i.e. `{1, 2, "a"}`.
    Parameters:
      `self` - an Object[]
    Returns:
      the string representation
    Since:
      1.0

  - ### toString

    public static String toString(Object value)
    Create a String representation of this object.
    Parameters:
      `value` - an object
    Returns:
      a string.
    Since:
      1.0

  - ### next

    public static Character next(Character self)
    Increment a Character by one.
    Parameters:
      `self` - a Character
    Returns:
      an incremented Character
    Since:
      1.5.7

  - ### next

    public static Number next(Number self)
    Increment a Number by one.
    Parameters:
      `self` - a Number
    Returns:
      an incremented Number
    Since:
      1.0

  - ### previous

    public static Character previous(Character self)
    Decrement a Character by one.
    Parameters:
      `self` - a Character
    Returns:
      a decremented Character
    Since:
      1.5.7

  - ### previous

    public static Number previous(Number self)
    Decrement a Number by one.
    Parameters:
      `self` - a Number
    Returns:
      a decremented Number
    Since:
      1.0

  - ### plus

    public static Number plus(Character left, Number right)
    Add a Character and a Number. The ordinal value of the Character is used in the addition (the ordinal value is the unicode value which for simple character sets is the ASCII value). This operation will always create a new object for the result, while the operands remain unchanged.
    Parameters:
      `left` - a Character
      `right` - a Number
    Returns:
      the Number corresponding to the addition of left and right
    Since:
      1.0
    See Also:
      - `Integer.valueOf(int)`

  - ### plus

    public static Number plus(Number left, Character right)
    Add a Number and a Character. The ordinal value of the Character is used in the addition (the ordinal value is the unicode value which for simple character sets is the ASCII value).
    Parameters:
      `left` - a Number
      `right` - a Character
    Returns:
      The Number corresponding to the addition of left and right
    Since:
      1.0
    See Also:
      - `Integer.valueOf(int)`

  - ### plus

    public static Number plus(Character left, Character right)
    Add one Character to another. The ordinal values of the Characters are used in the addition (the ordinal value is the unicode value which for simple character sets is the ASCII value). This operation will always create a new object for the result, while the operands remain unchanged.
    Parameters:
      `left` - a Character
      `right` - a Character
    Returns:
      the Number corresponding to the addition of left and right
    Since:
      1.0
    See Also:
      - `plus(java.lang.Number, java.lang.Character)`

  - ### plus

    public static String plus(Map left, String right)
    Appends a String to the literal of the Map instance.

         assert '[a:1] is a map' == [a:1] + ' is a map'

    Parameters:
      `left` - a Map
      `right` - a String
    Returns:
      the concatenated string
    Since:
      4.0.3

  - ### plus

    public static String plus(Map left, GString right)
    Appends a GString to the literal of the Map instance.

         assert '[a:1] is a map' == [a:1] + " is ${'a'} map"

    Parameters:
      `left` - a Map
      `right` - a GString
    Returns:
      the concatenated string
    Since:
      4.0.3

  - ### compareTo

    public static int compareTo(Character left, Number right)
    Compare a Character and a Number. The ordinal value of the Character is used in the comparison (the ordinal value is the unicode value which for simple character sets is the ASCII value).
    Parameters:
      `left` - a Character
      `right` - a Number
    Returns:
      the result of the comparison
    Since:
      1.0

  - ### compareTo

    public static int compareTo(Number left, Character right)
    Compare a Number and a Character. The ordinal value of the Character is used in the comparison (the ordinal value is the unicode value which for simple character sets is the ASCII value).
    Parameters:
      `left` - a Number
      `right` - a Character
    Returns:
      the result of the comparison
    Since:
      1.0

  - ### compareTo

    public static int compareTo(Character left, Character right)
    Compare two Characters. The ordinal values of the Characters are compared (the ordinal value is the unicode value which for simple character sets is the ASCII value).
    Parameters:
      `left` - a Character
      `right` - a Character
    Returns:
      the result of the comparison
    Since:
      1.0

  - ### compareTo

    public static int compareTo(Number left, Number right)
    Compare two Numbers. Equality (==) for numbers dispatches to this.
    Parameters:
      `left` - a Number
      `right` - another Number to compare to
    Returns:
      the comparison of both numbers
    Since:
      1.0

  - ### minus

    public static Number minus(Character left, Number right)
    Subtract a Number from a Character. The ordinal value of the Character is used in the subtraction (the ordinal value is the unicode value which for simple character sets is the ASCII value).
    Parameters:
      `left` - a Character
      `right` - a Number
    Returns:
      the Number corresponding to the subtraction of right from left
    Since:
      1.0

  - ### minus

    public static Number minus(Number left, Character right)
    Subtract a Character from a Number. The ordinal value of the Character is used in the subtraction (the ordinal value is the unicode value which for simple character sets is the ASCII value).
    Parameters:
      `left` - a Number
      `right` - a Character
    Returns:
      the Number corresponding to the subtraction of right from left
    Since:
      1.0

  - ### minus

    public static Number minus(Character left, Character right)
    Subtract one Character from another. The ordinal values of the Characters is used in the comparison (the ordinal value is the unicode value which for simple character sets is the ASCII value).
    Parameters:
      `left` - a Character
      `right` - a Character
    Returns:
      the Number corresponding to the subtraction of right from left
    Since:
      1.0

  - ### multiply

    public static Number multiply(Character left, Number right)
    Multiply a Character by a Number. The ordinal value of the Character is used in the multiplication (the ordinal value is the unicode value which for simple character sets is the ASCII value).
    Parameters:
      `left` - a Character
      `right` - a Number
    Returns:
      the Number corresponding to the multiplication of left by right
    Since:
      1.0

  - ### multiply

    public static Number multiply(Number left, Character right)
    Multiply a Number by a Character. The ordinal value of the Character is used in the multiplication (the ordinal value is the unicode value which for simple character sets is the ASCII value).
    Parameters:
      `left` - a Number
      `right` - a Character
    Returns:
      the multiplication of left by right
    Since:
      1.0

  - ### multiply

    public static Number multiply(Character left, Character right)
    Multiply two Characters. The ordinal values of the Characters are used in the multiplication (the ordinal value is the unicode value which for simple character sets is the ASCII value).
    Parameters:
      `left` - a Character
      `right` - another Character
    Returns:
      the Number corresponding to the multiplication of left by right
    Since:
      1.0

  - ### multiply

    public static Number multiply(BigDecimal left, Double right)
    Multiply a BigDecimal and a Double. Note: This method was added to enforce the Groovy rule of BigDecimal*Double == Double. Without this method, the multiply(BigDecimal) method in BigDecimal would respond and return a BigDecimal instead. Since BigDecimal is preferred over Number, the Number*Number method is not chosen as in older versions of Groovy.
    Parameters:
      `left` - a BigDecimal
      `right` - a Double
    Returns:
      the multiplication of left by right
    Since:
      1.0

  - ### multiply

    public static Number multiply(BigDecimal left, BigInteger right)
    Multiply a BigDecimal and a BigInteger. Note: This method was added to enforce the Groovy rule of BigDecimal*long == long. Without this method, the multiply(BigDecimal) method in BigDecimal would respond and return a BigDecimal instead. Since BigDecimal is preferred over Number, the Number*Number method is not chosen as in older versions of Groovy. BigInteger is the fallback for all integer types in Groovy
    Parameters:
      `left` - a BigDecimal
      `right` - a BigInteger
    Returns:
      the multiplication of left by right
    Since:
      1.0

  - ### isAtLeast

    public static Boolean isAtLeast(BigDecimal left, BigDecimal right)
    Compare a BigDecimal to another. A fluent api style alias for `compareTo`.
    Parameters:
      `left` - a BigDecimal
      `right` - a BigDecimal
    Returns:
      true if left is equal to or bigger than right
    Since:
      3.0.1

  - ### isAtLeast

    public static Boolean isAtLeast(BigDecimal left, String right)
    Compare a BigDecimal to a String representing a number. A fluent api style alias for `compareTo`.
    Parameters:
      `left` - a BigDecimal
      `right` - a String representing a number
    Returns:
      true if left is equal to or bigger than the value represented by right
    Since:
      3.0.1

  - ### power

    public static Number power(Number self, Number exponent)
    Power of a Number to a certain exponent. Called by the '**' operator.
    Parameters:
      `self` - a Number
      `exponent` - a Number exponent
    Returns:
      a Number to the power of a certain exponent
    Since:
      1.0

  - ### power

    public static Number power(BigDecimal self, Integer exponent)
    Power of a BigDecimal to an integer certain exponent. If the exponent is positive, call the BigDecimal.pow(int) method to maintain precision. Called by the '**' operator.
    Parameters:
      `self` - a BigDecimal
      `exponent` - an Integer exponent
    Returns:
      a Number to the power of the exponent

  - ### power

    public static Number power(BigInteger self, Integer exponent)
    Power of a BigInteger to an integer certain exponent. If the exponent is positive, call the BigInteger.pow(int) method to maintain precision. Called by the '**' operator.
    Parameters:
      `self` - a BigInteger
      `exponent` - an Integer exponent
    Returns:
      a Number to the power of the exponent

  - ### power

    public static Number power(Integer self, Integer exponent)
    Power of an integer to an integer certain exponent. If the exponent is positive, convert to a BigInteger and call BigInteger.pow(int) method to maintain precision. Called by the '**' operator.
    Parameters:
      `self` - an Integer
      `exponent` - an Integer exponent
    Returns:
      a Number to the power of the exponent

  - ### power

    public static Number power(Long self, Integer exponent)
    Power of a long to an integer certain exponent. If the exponent is positive, convert to a BigInteger and call BigInteger.pow(int) method to maintain precision. Called by the '**' operator.
    Parameters:
      `self` - a Long
      `exponent` - an Integer exponent
    Returns:
      a Number to the power of the exponent

  - ### power

    public static BigInteger power(BigInteger self, BigInteger exponent)
    Power of a BigInteger to a BigInteger certain exponent. Called by the '**' operator.
    Parameters:
      `self` - a BigInteger
      `exponent` - a BigInteger exponent
    Returns:
      a BigInteger to the power of the exponent
    Since:
      2.3.8

  - ### div

    public static Number div(Character left, Number right)
    Divide a Character by a Number. The ordinal value of the Character is used in the division (the ordinal value is the unicode value which for simple character sets is the ASCII value).
    Parameters:
      `left` - a Character
      `right` - a Number
    Returns:
      the Number corresponding to the division of left by right
    Since:
      1.0

  - ### div

    public static Number div(Number left, Character right)
    Divide a Number by a Character. The ordinal value of the Character is used in the division (the ordinal value is the unicode value which for simple character sets is the ASCII value).
    Parameters:
      `left` - a Number
      `right` - a Character
    Returns:
      the Number corresponding to the division of left by right
    Since:
      1.0

  - ### div

    public static Number div(Character left, Character right)
    Divide one Character by another. The ordinal values of the Characters are used in the division (the ordinal value is the unicode value which for simple character sets is the ASCII value).
    Parameters:
      `left` - a Character
      `right` - another Character
    Returns:
      the Number corresponding to the division of left by right
    Since:
      1.0

  - ### intdiv

    public static Number intdiv(Character left, Number right)
    Integer Divide a Character by a Number. The ordinal value of the Character is used in the division (the ordinal value is the unicode value which for simple character sets is the ASCII value).
    Parameters:
      `left` - a Character
      `right` - a Number
    Returns:
      a Number (an Integer) resulting from the integer division operation
    Since:
      1.0

  - ### intdiv

    public static Number intdiv(Number left, Character right)
    Integer Divide a Number by a Character. The ordinal value of the Character is used in the division (the ordinal value is the unicode value which for simple character sets is the ASCII value).
    Parameters:
      `left` - a Number
      `right` - a Character
    Returns:
      a Number (an Integer) resulting from the integer division operation
    Since:
      1.0

  - ### intdiv

    public static Number intdiv(Character left, Character right)
    Integer Divide two Characters. The ordinal values of the Characters are used in the division (the ordinal value is the unicode value which for simple character sets is the ASCII value).
    Parameters:
      `left` - a Character
      `right` - another Character
    Returns:
      a Number (an Integer) resulting from the integer division operation
    Since:
      1.0

  - ### intdiv

    public static Number intdiv(Number left, Number right)
    Integer Divide two Numbers.
    Parameters:
      `left` - a Number
      `right` - another Number
    Returns:
      a Number (an Integer) resulting from the integer division operation
    Since:
      1.0

  - ### or

    public static Number or(Number left, Number right)
    Bitwise OR together two numbers.
    Parameters:
      `left` - a Number
      `right` - another Number to bitwise OR
    Returns:
      the bitwise OR of both Numbers
    Since:
      1.0

  - ### and

    public static Number and(Number left, Number right)
    Bitwise AND together two Numbers.
    Parameters:
      `left` - a Number
      `right` - another Number to bitwise AND
    Returns:
      the bitwise AND of both Numbers
    Since:
      1.0

  - ### and

    public static BitSet and(BitSet left, BitSet right)
    Bitwise AND together two BitSets.
    Parameters:
      `left` - a BitSet
      `right` - another BitSet to bitwise AND
    Returns:
      the bitwise AND of both BitSets
    Since:
      1.5.0

  - ### xor

    public static BitSet xor(BitSet left, BitSet right)
    Bitwise XOR together two BitSets. Called when the '^' operator is used between two bit sets.
    Parameters:
      `left` - a BitSet
      `right` - another BitSet to bitwise AND
    Returns:
      the bitwise XOR of both BitSets
    Since:
      1.5.0

  - ### bitwiseNegate

    public static BitSet bitwiseNegate(BitSet self)
    Bitwise NEGATE a BitSet.
    Parameters:
      `self` - a BitSet
    Returns:
      the bitwise NEGATE of the BitSet
    Since:
      1.5.0

  - ### bitwiseNegate

    public static Number bitwiseNegate(Number left)
    Bitwise NEGATE a Number.
    Parameters:
      `left` - a Number
    Returns:
      the bitwise NEGATE of the Number
    Since:
      2.2.0

  - ### or

    public static BitSet or(BitSet left, BitSet right)
    Bitwise OR together two BitSets. Called when the '|' operator is used between two bit sets.
    Parameters:
      `left` - a BitSet
      `right` - another BitSet to bitwise AND
    Returns:
      the bitwise OR of both BitSets
    Since:
      1.5.0

  - ### xor

    public static Number xor(Number left, Number right)
    Bitwise XOR together two Numbers. Called when the '^' operator is used.
    Parameters:
      `left` - a Number
      `right` - another Number to bitwise XOR
    Returns:
      the bitwise XOR of both Numbers
    Since:
      1.0

  - ### mod

    public static Number mod(Number left, Number right)
    Performs a division modulus operation. Called by the '%' operator.
    Parameters:
      `left` - a Number
      `right` - another Number to mod
    Returns:
      the modulus result
    Since:
      1.0

  - ### unaryMinus

    public static Number unaryMinus(Number left)
    Negates the number. Equivalent to the '-' operator when it precedes a single operand, i.e. `-10`
    Parameters:
      `left` - a Number
    Returns:
      the negation of the number
    Since:
      1.5.0

  - ### unaryPlus

    public static Number unaryPlus(Number left)
    Returns the number, effectively being a noop for numbers. Operator overloaded form of the '+' operator when it precedes a single operand, i.e. `+10`
    Parameters:
      `left` - a Number
    Returns:
      the number
    Since:
      2.2.0

  - ### times

    public static void times(Number self, Closure closure)
    Executes the closure this many times, starting from zero. The current index is passed to the closure each time. Example:

        10.times {
           println it
         }

    Prints the numbers 0 through 9.
    Parameters:
      `self` - a Number
      `closure` - the closure to call a number of times
    Since:
      1.0

  - ### upto

    public static void upto(Number self, Number to, Closure closure)
    Iterates from this number up to the given number, inclusive, incrementing by one each time.
    Parameters:
      `self` - a Number
      `to` - another Number to go up to
      `closure` - the closure to call
    Since:
      1.0

  - ### upto

    public static void upto(long self, Number to, Closure closure)
    Iterates from this number up to the given number, inclusive, incrementing by one each time.
    Parameters:
      `self` - a long
      `to` - the end number
      `closure` - the code to execute for each number
    Since:
      1.0

  - ### upto

    public static void upto(Long self, Number to, Closure closure)
    Iterates from this number up to the given number, inclusive, incrementing by one each time.
    Parameters:
      `self` - a Long
      `to` - the end number
      `closure` - the code to execute for each number
    Since:
      1.0

  - ### upto

    public static void upto(float self, Number to, Closure closure)
    Iterates from this number up to the given number, inclusive, incrementing by one each time.
    Parameters:
      `self` - a float
      `to` - the end number
      `closure` - the code to execute for each number
    Since:
      1.0

  - ### upto

    public static void upto(Float self, Number to, Closure closure)
    Iterates from this number up to the given number, inclusive, incrementing by one each time.
    Parameters:
      `self` - a Float
      `to` - the end number
      `closure` - the code to execute for each number
    Since:
      1.0

  - ### upto

    public static void upto(double self, Number to, Closure closure)
    Iterates from this number up to the given number, inclusive, incrementing by one each time.
    Parameters:
      `self` - a double
      `to` - the end number
      `closure` - the code to execute for each number
    Since:
      1.0

  - ### upto

    public static void upto(Double self, Number to, Closure closure)
    Iterates from this number up to the given number, inclusive, incrementing by one each time.
    Parameters:
      `self` - a Double
      `to` - the end number
      `closure` - the code to execute for each number
    Since:
      1.0

  - ### upto

    public static void upto(BigInteger self, Number to, Closure closure)
    Iterates from this number up to the given number, inclusive, incrementing by one each time. Example:

        0.upto( 10 ) {
           println it
         }

    Prints numbers 0 to 10
    Parameters:
      `self` - a BigInteger
      `to` - the end number
      `closure` - the code to execute for each number
    Since:
      1.0

  - ### upto

    public static void upto(BigDecimal self, Number to, Closure closure)
    Iterates from this number up to the given number, inclusive, incrementing by one each time.

        0.1.upto( 10 ) {
           println it
         }

    Prints numbers 0.1, 1.1, 2.1... to 9.1
    Parameters:
      `self` - a BigDecimal
      `to` - the end number
      `closure` - the code to execute for each number
    Since:
      1.0

  - ### downto

    public static void downto(Number self, Number to, Closure closure)
    Iterates from this number down to the given number, inclusive, decrementing by one each time.
    Parameters:
      `self` - a Number
      `to` - another Number to go down to
      `closure` - the closure to call
    Since:
      1.0

  - ### downto

    public static void downto(long self, Number to, Closure closure)
    Iterates from this number down to the given number, inclusive, decrementing by one each time.
    Parameters:
      `self` - a long
      `to` - the end number
      `closure` - the code to execute for each number
    Since:
      1.0

  - ### downto

    public static void downto(Long self, Number to, Closure closure)
    Iterates from this number down to the given number, inclusive, decrementing by one each time.
    Parameters:
      `self` - a Long
      `to` - the end number
      `closure` - the code to execute for each number
    Since:
      1.0

  - ### downto

    public static void downto(float self, Number to, Closure closure)
    Iterates from this number down to the given number, inclusive, decrementing by one each time.
    Parameters:
      `self` - a float
      `to` - the end number
      `closure` - the code to execute for each number
    Since:
      1.0

  - ### downto

    public static void downto(Float self, Number to, Closure closure)
    Iterates from this number down to the given number, inclusive, decrementing by one each time.
    Parameters:
      `self` - a Float
      `to` - the end number
      `closure` - the code to execute for each number
    Since:
      1.0

  - ### downto

    public static void downto(double self, Number to, Closure closure)
    Iterates from this number down to the given number, inclusive, decrementing by one each time.
    Parameters:
      `self` - a double
      `to` - the end number
      `closure` - the code to execute for each number
    Since:
      1.0

  - ### downto

    public static void downto(Double self, Number to, Closure closure)
    Iterates from this number down to the given number, inclusive, decrementing by one each time.
    Parameters:
      `self` - a Double
      `to` - the end number
      `closure` - the code to execute for each number
    Since:
      1.0

  - ### downto

    public static void downto(BigInteger self, Number to, Closure closure)
    Iterates from this number down to the given number, inclusive, decrementing by one each time.
    Parameters:
      `self` - a BigInteger
      `to` - the end number
      `closure` - the code to execute for each number
    Since:
      1.0

  - ### downto

    public static void downto(BigDecimal self, Number to, Closure closure)
    Iterates from this number down to the given number, inclusive, decrementing by one each time. Each number is passed to the closure. Example:

         10.5.downto(0) {
           println it
         }

    Prints numbers 10.5, 9.5 ... to 0.5.
    Parameters:
      `self` - a BigDecimal
      `to` - the end number
      `closure` - the code to execute for each number
    Since:
      1.0

  - ### step

    public static void step(Number self, Number to, Number stepNumber, Closure closure)
    Iterates from this number up to the given number using a step increment. Each intermediate number is passed to the given closure. Example:

         0.step( 10, 2 ) {
           println it
         }

    Prints even numbers 0 through 8.
    Parameters:
      `self` - a Number to start with
      `to` - a Number to go up to, exclusive
      `stepNumber` - a Number representing the step increment
      `closure` - the closure to call
    Since:
      1.0

  - ### abs

    public static int abs(Number number)
    Get the absolute value
    Parameters:
      `number` - a Number
    Returns:
      the absolute value of that Number
    Since:
      1.0

  - ### abs

    public static long abs(Long number)
    Get the absolute value
    Parameters:
      `number` - a Long
    Returns:
      the absolute value of that Long
    Since:
      1.0

  - ### abs

    public static float abs(Float number)
    Get the absolute value
    Parameters:
      `number` - a Float
    Returns:
      the absolute value of that Float
    Since:
      1.0

  - ### abs

    public static double abs(Double number)
    Get the absolute value
    Parameters:
      `number` - a Double
    Returns:
      the absolute value of that Double
    Since:
      1.0

  - ### equalsIgnoreZeroSign

    public static boolean equalsIgnoreZeroSign(Float number, Object other)
    Compares this object against the specified object returning the same result as `Float.equals(Object)` but returning true if this object and the specified object are both zero and negative zero respectively or vice versa.
    Since:
      3.0.8

  - ### equalsIgnoreZeroSign

    public static boolean equalsIgnoreZeroSign(Double number, Object other)
    Compares this object against the specified object returning the same result as `Double.equals(Object)` but returning true if this object and the specified object are both zero and negative zero respectively or vice versa.
    Since:
      3.0.8

  - ### round

    public static int round(Float number)
    Round the value
    Parameters:
      `number` - a Float
    Returns:
      the rounded value of that Float
    Since:
      1.0

  - ### round

    public static float round(Float number, int precision)
    Round the value
    Parameters:
      `number` - a Float
      `precision` - the number of decimal places to keep
    Returns:
      the Float rounded to the number of decimal places specified by precision
    Since:
      1.6.0

  - ### trunc

    public static float trunc(Float number, int precision)
    Truncate the value
    Parameters:
      `number` - a Float
      `precision` - the number of decimal places to keep
    Returns:
      the Float truncated to the number of decimal places specified by precision
    Since:
      1.6.0

  - ### trunc

    public static float trunc(Float number)
    Truncate the value
    Parameters:
      `number` - a Float
    Returns:
      the Float truncated to 0 decimal places
    Since:
      1.6.0

  - ### round

    public static long round(Double number)
    Round the value
    Parameters:
      `number` - a Double
    Returns:
      the rounded value of that Double
    Since:
      1.0

  - ### round

    public static double round(Double number, int precision)
    Round the value
    Parameters:
      `number` - a Double
      `precision` - the number of decimal places to keep
    Returns:
      the Double rounded to the number of decimal places specified by precision
    Since:
      1.6.4

  - ### trunc

    public static double trunc(Double number)
    Truncate the value
    Parameters:
      `number` - a Double
    Returns:
      the Double truncated to 0 decimal places
    Since:
      1.6.4

  - ### trunc

    public static double trunc(Double number, int precision)
    Truncate the value
    Parameters:
      `number` - a Double
      `precision` - the number of decimal places to keep
    Returns:
      the Double truncated to the number of decimal places specified by precision
    Since:
      1.6.4

  - ### round

    public static BigDecimal round(BigDecimal number)
    Round the value

    Note that this method differs from `BigDecimal.round(java.math.MathContext)` which specifies the digits to retain starting from the leftmost nonzero digit. This method rounds the integral part to the nearest whole number.

    Parameters:
      `number` - a BigDecimal
    Returns:
      the rounded value of that BigDecimal
    Since:
      2.5.0
    See Also:
      - `round(java.math.BigDecimal, int)`
      - `BigDecimal.round(java.math.MathContext)`

  - ### round

    public static BigDecimal round(BigDecimal number, int precision)
    Round the value

    Note that this method differs from `BigDecimal.round(java.math.MathContext)` which specifies the digits to retain starting from the leftmost nonzero digit. This method operates on the fractional part of the number and the precision argument specifies the number of digits to the right of the decimal point to retain.

    Parameters:
      `number` - a BigDecimal
      `precision` - the number of decimal places to keep
    Returns:
      a BigDecimal rounded to the number of decimal places specified by precision
    Since:
      2.5.0
    See Also:
      - `round(java.math.BigDecimal)`
      - `BigDecimal.round(java.math.MathContext)`

  - ### trunc

    public static BigDecimal trunc(BigDecimal number)
    Truncate the value
    Parameters:
      `number` - a BigDecimal
    Returns:
      a BigDecimal truncated to 0 decimal places
    Since:
      2.5.0
    See Also:
      - `trunc(java.math.BigDecimal, int)`

  - ### trunc

    public static BigDecimal trunc(BigDecimal number, int precision)
    Truncate the value
    Parameters:
      `number` - a BigDecimal
      `precision` - the number of decimal places to keep
    Returns:
      a BigDecimal truncated to the number of decimal places specified by precision
    Since:
      2.5.0
    See Also:
      - `trunc(java.math.BigDecimal)`

  - ### isUpperCase

    public static boolean isUpperCase(Character self)
    Determine if a Character is uppercase. Synonym for 'Character.isUpperCase(this)'.
    Parameters:
      `self` - a Character
    Returns:
      true if the character is uppercase
    Since:
      1.5.7
    See Also:
      - `Character.isUpperCase(char)`

  - ### isLowerCase

    public static boolean isLowerCase(Character self)
    Determine if a Character is lowercase. Synonym for 'Character.isLowerCase(this)'.
    Parameters:
      `self` - a Character
    Returns:
      true if the character is lowercase
    Since:
      1.5.7
    See Also:
      - `Character.isLowerCase(char)`

  - ### isLetter

    public static boolean isLetter(Character self)
    Determines if a character is a letter. Synonym for 'Character.isLetter(this)'.
    Parameters:
      `self` - a Character
    Returns:
      true if the character is a letter
    Since:
      1.5.7
    See Also:
      - `Character.isLetter(char)`

  - ### isDigit

    public static boolean isDigit(Character self)
    Determines if a character is a digit. Synonym for 'Character.isDigit(this)'.
    Parameters:
      `self` - a Character
    Returns:
      true if the character is a digit
    Since:
      1.5.7
    See Also:
      - `Character.isDigit(char)`

  - ### isLetterOrDigit

    public static boolean isLetterOrDigit(Character self)
    Determines if a character is a letter or digit. Synonym for 'Character.isLetterOrDigit(this)'.
    Parameters:
      `self` - a Character
    Returns:
      true if the character is a letter or digit
    Since:
      1.5.7
    See Also:
      - `Character.isLetterOrDigit(char)`

  - ### isWhitespace

    public static boolean isWhitespace(Character self)
    Determines if a character is a whitespace character. Synonym for 'Character.isWhitespace(this)'.
    Parameters:
      `self` - a Character
    Returns:
      true if the character is a whitespace character
    Since:
      1.5.7
    See Also:
      - `Character.isWhitespace(char)`

  - ### toUpperCase

    public static char toUpperCase(Character self)
    Converts the character to uppercase. Synonym for 'Character.toUpperCase(this)'.
    Parameters:
      `self` - a Character to convert
    Returns:
      the uppercase equivalent of the character, if any; otherwise, the character itself.
    Since:
      1.5.7
    See Also:
      - `Character.isUpperCase(char)`
      - `String.toUpperCase()`

  - ### toLowerCase

    public static char toLowerCase(Character self)
    Converts the character to lowercase. Synonym for 'Character.toLowerCase(this)'.
    Parameters:
      `self` - a Character to convert
    Returns:
      the lowercase equivalent of the character, if any; otherwise, the character itself.
    Since:
      1.5.7
    See Also:
      - `Character.isLowerCase(char)`
      - `String.toLowerCase()`

  - ### toInteger

    public static Integer toInteger(Number self)
    Transform a Number into an Integer
    Parameters:
      `self` - a Number
    Returns:
      an Integer
    Since:
      1.0

  - ### toLong

    public static Long toLong(Number self)
    Transform a Number into a Long
    Parameters:
      `self` - a Number
    Returns:
      a Long
    Since:
      1.0

  - ### toFloat

    public static Float toFloat(Number self)
    Transform a Number into a Float
    Parameters:
      `self` - a Number
    Returns:
      a Float
    Since:
      1.0

  - ### toDouble

    public static Double toDouble(Number self)
    Transform a Number into a Double
    Parameters:
      `self` - a Number
    Returns:
      a Double
    Since:
      1.0

  - ### toBigDecimal

    public static BigDecimal toBigDecimal(Number self)
    Transform a Number into a BigDecimal
    Parameters:
      `self` - a Number
    Returns:
      a BigDecimal
    Since:
      1.0

  - ### asType

    public static <T> T asType(Number self, Class<T> c)
    Transform this number to the given type, using the 'as' operator. The following types are supported in addition to the default `asType(java.lang.Object, java.lang.Class)`:
    - BigDecimal
    - BigInteger
    - Double
    - Float
    Parameters:
      `self` - this number
      `c` - the desired type of the transformed result
    Returns:
      an instance of the given type
    Since:
      1.0

  - ### toBigInteger

    public static BigInteger toBigInteger(Number self)
    Transform this Number into a BigInteger.
    Parameters:
      `self` - a Number
    Returns:
      a BigInteger
    Since:
      1.0

  - ### and

    public static Boolean and(Boolean left, Boolean right)
    Logical conjunction of two boolean operators.
    Parameters:
      `left` - left operator
      `right` - right operator
    Returns:
      result of logical conjunction
    Since:
      1.0

  - ### or

    public static Boolean or(Boolean left, Boolean right)
    Logical disjunction of two boolean operators
    Parameters:
      `left` - left operator
      `right` - right operator
    Returns:
      result of logical disjunction
    Since:
      1.0

  - ### implies

    public static Boolean implies(Boolean left, Boolean right)
    Logical implication of two boolean operators
    Parameters:
      `left` - left operator
      `right` - right operator
    Returns:
      result of logical implication
    Since:
      1.8.3

  - ### xor

    public static Boolean xor(Boolean left, Boolean right)
    Exclusive disjunction of two boolean operators
    Parameters:
      `left` - left operator
      `right` - right operator
    Returns:
      result of exclusive disjunction
    Since:
      1.0

  - ### runAfter

    public static TimerTask runAfter(Timer timer, int delay, Closure closure)
    Allows a simple syntax for using timers. This timer will execute the given closure after the given delay.
    Parameters:
      `timer` - a timer object
      `delay` - the delay in milliseconds before running the closure code
      `closure` - the closure to invoke
    Returns:
      The timer task which has been scheduled.
    Since:
      1.5.0

  - ### eachByte

    public static void eachByte(Byte[] self, Closure closure)
    Traverse through each byte of this Byte array. Alias for each.
    Parameters:
      `self` - a Byte array
      `closure` - a closure
    Since:
      1.5.5
    See Also:
      - `each(java.lang.Object, groovy.lang.Closure)`

  - ### eachByte

    public static void eachByte(byte[] self, Closure closure)
    Traverse through each byte of this byte array. Alias for each.
    Parameters:
      `self` - a byte array
      `closure` - a closure
    Since:
      1.5.5
    See Also:
      - `each(java.lang.Object, groovy.lang.Closure)`

  - ### findIndexOf

    public static int findIndexOf(Object self, Closure condition)
    Iterates over the elements of an aggregate of items and returns the index of the first item that matches the condition specified in the closure.
    Parameters:
      `self` - the iteration object over which to iterate
      `condition` - the matching condition
    Returns:
      an integer that is the index of the first matched object or -1 if no match was found
    Since:
      1.0

  - ### findIndexOf

    public static int findIndexOf(Object self, int startIndex, Closure condition)
    Iterates over the elements of an aggregate of items, starting from a specified startIndex, and returns the index of the first item that matches the condition specified in the closure. Example (aggregate is `ChronoUnit` enum values):

         import java.time.temporal.ChronoUnit
         def nameStartsWithM = { it.name().startsWith('M') }
         def first  = ChronoUnit.findIndexOf(nameStartsWithM)
         def second = ChronoUnit.findIndexOf(first + 1, nameStartsWithM)
         def third  = ChronoUnit.findIndexOf(second + 1, nameStartsWithM)
         Set units  = [first, second, third]
         assert !units.contains(-1) // should have found 3 of MICROS, MILLIS, MINUTES, MONTHS, ...
         assert units.size() == 3 // just check size so as not to rely on order

    Parameters:
      `self` - the iteration object over which to iterate
      `startIndex` - start matching from this index
      `condition` - the matching condition
    Returns:
      an integer that is the index of the first matched object or -1 if no match was found
    Since:
      1.5.0

  - ### findIndexOf

    public static <T> int findIndexOf(Iterator<T> self, Closure condition)
    Iterates over the elements of an Iterator and returns the index of the first item that satisfies the condition specified by the closure.
    Parameters:
      `self` - an Iterator
      `condition` - the matching condition
    Returns:
      an integer that is the index of the first matched object or -1 if no match was found
    Since:
      2.5.0

  - ### findIndexOf

    public static <T> int findIndexOf(Iterator<T> self, int startIndex, Closure condition)
    Iterates over the elements of an Iterator, starting from a specified startIndex, and returns the index of the first item that satisfies the condition specified by the closure.
    Parameters:
      `self` - an Iterator
      `startIndex` - start matching from this index
      `condition` - the matching condition
    Returns:
      an integer that is the index of the first matched object or -1 if no match was found
    Since:
      2.5.0

  - ### findIndexOf

    public static <T> int findIndexOf(Iterable<T> self, Closure condition)
    Iterates over the elements of an Iterable and returns the index of the first item that satisfies the condition specified by the closure.
    Parameters:
      `self` - an Iterable
      `condition` - the matching condition
    Returns:
      an integer that is the index of the first matched object or -1 if no match was found
    Since:
      2.5.0

  - ### findIndexOf

    public static <T> int findIndexOf(Iterable<T> self, int startIndex, Closure condition)
    Iterates over the elements of an Iterable, starting from a specified startIndex, and returns the index of the first item that satisfies the condition specified by the closure.
    Parameters:
      `self` - an Iterable
      `startIndex` - start matching from this index
      `condition` - the matching condition
    Returns:
      an integer that is the index of the first matched object or -1 if no match was found
    Since:
      2.5.0

  - ### findIndexOf

    public static <T> int findIndexOf(T[] self, Closure condition)
    Iterates over the elements of an Array and returns the index of the first item that satisfies the condition specified by the closure.
    Parameters:
      `self` - an Array
      `condition` - the matching condition
    Returns:
      an integer that is the index of the first matched object or -1 if no match was found
    Since:
      2.5.0

  - ### findIndexOf

    public static <T> int findIndexOf(T[] self, int startIndex, Closure condition)
    Iterates over the elements of an Array, starting from a specified startIndex, and returns the index of the first item that satisfies the condition specified by the closure.
    Parameters:
      `self` - an Array
      `startIndex` - start matching from this index
      `condition` - the matching condition
    Returns:
      an integer that is the index of the first matched object or -1 if no match was found
    Since:
      2.5.0

  - ### findLastIndexOf

    public static int findLastIndexOf(Object self, Closure condition)
    Iterates over the elements of an aggregate of items and returns the index of the last item that matches the condition specified in the closure. Example (aggregate is `ChronoUnit` enum values):

         import java.time.temporal.ChronoUnit
         def nameStartsWithM = { it.name().startsWith('M') }
         def first = ChronoUnit.findIndexOf(nameStartsWithM)
         def last  = ChronoUnit.findLastIndexOf(nameStartsWithM)
         // should have found 2 unique index values for MICROS, MILLIS, MINUTES, MONTHS, ...
         assert first != -1 && last != -1 && first != last

    Parameters:
      `self` - the iteration object over which to iterate
      `condition` - the matching condition
    Returns:
      an integer that is the index of the last matched object or -1 if no match was found
    Since:
      1.5.2

  - ### findLastIndexOf

    public static int findLastIndexOf(Object self, int startIndex, Closure condition)
    Iterates over the elements of an aggregate of items, starting from a specified startIndex, and returns the index of the last item that matches the condition specified in the closure.
    Parameters:
      `self` - the iteration object over which to iterate
      `startIndex` - start matching from this index
      `condition` - the matching condition
    Returns:
      an integer that is the index of the last matched object or -1 if no match was found
    Since:
      1.5.2

  - ### findLastIndexOf

    public static <T> int findLastIndexOf(Iterator<T> self, Closure condition)
    Iterates over the elements of an Iterator and returns the index of the last item that matches the condition specified in the closure.
    Parameters:
      `self` - an Iterator
      `condition` - the matching condition
    Returns:
      an integer that is the index of the last matched object or -1 if no match was found
    Since:
      2.5.0

  - ### findLastIndexOf

    public static <T> int findLastIndexOf(Iterator<T> self, int startIndex, Closure condition)
    Iterates over the elements of an Iterator, starting from a specified startIndex, and returns the index of the last item that matches the condition specified in the closure.
    Parameters:
      `self` - an Iterator
      `startIndex` - start matching from this index
      `condition` - the matching condition
    Returns:
      an integer that is the index of the last matched object or -1 if no match was found
    Since:
      2.5.0

  - ### findLastIndexOf

    public static <T> int findLastIndexOf(Iterable<T> self, Closure condition)
    Iterates over the elements of an Iterable and returns the index of the last item that matches the condition specified in the closure.
    Parameters:
      `self` - an Iterable
      `condition` - the matching condition
    Returns:
      an integer that is the index of the last matched object or -1 if no match was found
    Since:
      2.5.0

  - ### findLastIndexOf

    public static <T> int findLastIndexOf(Iterable<T> self, int startIndex, Closure condition)
    Iterates over the elements of an Iterable, starting from a specified startIndex, and returns the index of the last item that matches the condition specified in the closure.
    Parameters:
      `self` - an Iterable
      `startIndex` - start matching from this index
      `condition` - the matching condition
    Returns:
      an integer that is the index of the last matched object or -1 if no match was found
    Since:
      2.5.0

  - ### findLastIndexOf

    public static <T> int findLastIndexOf(T[] self, Closure condition)
    Iterates over the elements of an Array and returns the index of the last item that matches the condition specified in the closure.
    Parameters:
      `self` - an Array
      `condition` - the matching condition
    Returns:
      an integer that is the index of the last matched object or -1 if no match was found
    Since:
      2.5.0

  - ### findLastIndexOf

    public static <T> int findLastIndexOf(T[] self, int startIndex, Closure condition)
    Iterates over the elements of an Array, starting from a specified startIndex, and returns the index of the last item that matches the condition specified in the closure.
    Parameters:
      `self` - an Array
      `startIndex` - start matching from this index
      `condition` - the matching condition
    Returns:
      an integer that is the index of the last matched object or -1 if no match was found
    Since:
      2.5.0

  - ### findIndexValues

    public static List<Number> findIndexValues(Object self, Closure condition)
    Iterates over the elements of an aggregate of items and returns the index values of the items that match the condition specified in the closure.
    Parameters:
      `self` - the iteration object over which to iterate
      `condition` - the matching condition
    Returns:
      a list of numbers corresponding to the index values of all matched objects
    Since:
      1.5.2

  - ### findIndexValues

    public static List<Number> findIndexValues(Object self, Number startIndex, Closure condition)
    Iterates over the elements of an aggregate of items, starting from a specified startIndex, and returns the index values of the items that match the condition specified in the closure.
    Parameters:
      `self` - the iteration object over which to iterate
      `startIndex` - start matching from this index
      `condition` - the matching condition
    Returns:
      a list of numbers corresponding to the index values of all matched objects
    Since:
      1.5.2

  - ### findIndexValues

    public static <T> List<Number> findIndexValues(Iterator<T> self, Closure condition)
    Iterates over the elements of an Iterator and returns the index values of the items that match the condition specified in the closure.
    Parameters:
      `self` - an Iterator
      `condition` - the matching condition
    Returns:
      a list of numbers corresponding to the index values of all matched objects
    Since:
      2.5.0

  - ### findIndexValues

    public static <T> List<Number> findIndexValues(Iterator<T> self, Number startIndex, Closure condition)
    Iterates over the elements of an Iterator, starting from a specified startIndex, and returns the index values of the items that match the condition specified in the closure.
    Parameters:
      `self` - an Iterator
      `startIndex` - start matching from this index
      `condition` - the matching condition
    Returns:
      a list of numbers corresponding to the index values of all matched objects
    Since:
      2.5.0

  - ### findIndexValues

    public static <T> List<Number> findIndexValues(Iterable<T> self, Closure condition)
    Iterates over the elements of an Iterable and returns the index values of the items that match the condition specified in the closure.
    Parameters:
      `self` - an Iterable
      `condition` - the matching condition
    Returns:
      a list of numbers corresponding to the index values of all matched objects
    Since:
      2.5.0

  - ### findIndexValues

    public static <T> List<Number> findIndexValues(Iterable<T> self, Number startIndex, Closure condition)
    Iterates over the elements of an Iterable, starting from a specified startIndex, and returns the index values of the items that match the condition specified in the closure.
    Parameters:
      `self` - an Iterable
      `startIndex` - start matching from this index
      `condition` - the matching condition
    Returns:
      a list of numbers corresponding to the index values of all matched objects
    Since:
      2.5.0

  - ### findIndexValues

    public static <T> List<Number> findIndexValues(T[] self, Closure condition)
    Iterates over the elements of an Array and returns the index values of the items that match the condition specified in the closure.
    Parameters:
      `self` - an Array
      `condition` - the matching condition
    Returns:
      a list of numbers corresponding to the index values of all matched objects
    Since:
      2.5.0

  - ### findIndexValues

    public static <T> List<Number> findIndexValues(T[] self, Number startIndex, Closure condition)
    Iterates over the elements of an Array, starting from a specified startIndex, and returns the index values of the items that match the condition specified in the closure.
    Parameters:
      `self` - an Array
      `startIndex` - start matching from this index
      `condition` - the matching condition
    Returns:
      a list of numbers corresponding to the index values of all matched objects
    Since:
      2.5.0

  - ### getRootLoader

    public static ClassLoader getRootLoader(ClassLoader self)
    Iterates through the classloader parents until it finds a loader with a class named "org.codehaus.groovy.tools.RootLoader". If there is no such class `null` will be returned. The name is used for comparison because a direct comparison using == may fail as the class may be loaded through different classloaders.
    Parameters:
      `self` - a ClassLoader
    Returns:
      the rootLoader for the ClassLoader
    Since:
      1.5.0
    See Also:
      - `RootLoader`

  - ### asType

    public static <T> T asType(Object obj, Class<T> type)
    Converts a given object to a type. This method is used through the "as" operator and is overloadable as any other operator.
    Parameters:
      `obj` - the object to convert
      `type` - the goal type
    Returns:
      the resulting object
    Since:
      1.0

  - ### newInstance

    public static <T> T newInstance(Class<T> c)
    Convenience method to dynamically create a new instance of this class. Calls the default constructor.
    Parameters:
      `c` - a class
    Returns:
      a new instance of this class
    Since:
      1.0

  - ### newInstance

    public static <T> T newInstance(Class<T> c, Object[] args)
    Helper to construct a new instance from the given arguments. The constructor is called based on the number and types in the args array. Use `newInstance(null)` or simply `newInstance()` for the default (no-arg) constructor.
    Parameters:
      `c` - a class
      `args` - the constructor arguments
    Returns:
      a new instance of this class.
    Since:
      1.0

  - ### getMetaClass

    public static MetaClass getMetaClass(Class c)
    Adds a "metaClass" property to all class objects so you can use the syntax `String.metaClass.myMethod = { println "foo" }`
    Parameters:
      `c` - The java.lang.Class instance
    Returns:
      An MetaClass instance
    Since:
      1.5.0

  - ### getMetaClass

    public static MetaClass getMetaClass(Object obj)
    Obtains a MetaClass for an object either from the registry or in the case of a GroovyObject from the object itself.
    Parameters:
      `obj` - The object in question
    Returns:
      The MetaClass
    Since:
      1.5.0

  - ### getMetaClass

    public static MetaClass getMetaClass(GroovyObject obj)
    Obtains a MetaClass for an object either from the registry or in the case of a GroovyObject from the object itself.
    Parameters:
      `obj` - The object in question
    Returns:
      The MetaClass
    Since:
      1.6.0

  - ### setMetaClass

    public static void setMetaClass(Class self, MetaClass metaClass)
    Sets the metaclass for a given class.
    Parameters:
      `self` - the class whose metaclass we wish to set
      `metaClass` - the new MetaClass
    Since:
      1.6.0

  - ### setMetaClass

    public static void setMetaClass(Object self, MetaClass metaClass)
    Sets the metaclass for an object.
    Parameters:
      `self` - the object whose metaclass we want to set
      `metaClass` - the new metaclass value
    Since:
      1.6.0

  - ### setMetaClass

    public static void setMetaClass(GroovyObject self, MetaClass metaClass)
    Sets the metaclass for a `GroovyObject`.
    Parameters:
      `self` - the object whose metaclass we want to set
      `metaClass` - the new metaclass value
    Since:
      2.0.0

  - ### metaClass

    public static MetaClass metaClass(Class self, @DelegatesTo(type="groovy.lang.ExpandoMetaClass.DefiningClosure",strategy=3) Closure closure)
    Sets/updates the metaclass for a given class to a closure.
    Parameters:
      `self` - the class whose metaclass we wish to update
      `closure` - the closure representing the new metaclass
    Returns:
      the new metaclass value
    Throws:
      `GroovyRuntimeException` - if the metaclass can't be set for this class
    Since:
      1.6.0

  - ### metaClass

    public static MetaClass metaClass(Object self, @DelegatesTo(type="groovy.lang.ExpandoMetaClass.DefiningClosure",strategy=3) Closure closure)
    Sets/updates the metaclass for a given object to a closure.
    Parameters:
      `self` - the object whose metaclass we wish to update
      `closure` - the closure representing the new metaclass
    Returns:
      the new metaclass value
    Throws:
      `GroovyRuntimeException` - if the metaclass can't be set for this object
    Since:
      1.6.0

  - ### iterator

    public static <T> Iterator<T> iterator(T[] a)
    Attempts to create an Iterator for the given object by first converting it to a Collection.
    Parameters:
      `a` - an array
    Returns:
      an Iterator for the given Array.
    Since:
      1.6.4
    See Also:
      - `DefaultTypeTransformation.asCollection(java.lang.Object[])`

  - ### iterator

    public static Iterator iterator(Object o)
    Attempts to create an Iterator for the given object by first converting it to a Collection.
    Parameters:
      `o` - an object
    Returns:
      an Iterator for the given Object.
    Since:
      1.0
    See Also:
      - `DefaultTypeTransformation.asCollection(java.lang.Object)`

  - ### iterator

    public static <T> Iterator<T> iterator(Enumeration<T> enumeration)
    Allows an Enumeration to behave like an Iterator. Note that the `remove()` method is unsupported since the underlying Enumeration does not provide a mechanism for removing items.
    Parameters:
      `enumeration` - an Enumeration object
    Returns:
      an Iterator for the given Enumeration
    Since:
      1.0

  - ### iterator

    public static <T> Iterator<T> iterator(Iterator<T> self)
    An identity function for iterators, supporting 'duck-typing' when trying to get an iterator for each object within a collection, some of which may already be iterators.
    Parameters:
      `self` - an iterator object
    Returns:
      itself
    Since:
      1.5.0

  - ### buffered

    public static <T> BufferedIterator<T> buffered(Iterator<T> self)
    Returns a `BufferedIterator` that allows examining the next element without consuming it.

         assert [1, 2, 3, 4].iterator().buffered().with { [head(), toList()] } == [1, [1, 2, 3, 4]]

    Parameters:
      `self` - an iterator object
    Returns:
      a BufferedIterator wrapping self
    Since:
      2.5.0

  - ### bufferedIterator

    public static <T> BufferedIterator<T> bufferedIterator(Iterable<T> self)
    Returns a `BufferedIterator` that allows examining the next element without consuming it.

         assert new LinkedHashSet([1,2,3,4]).bufferedIterator().with { [head(), toList()] } == [1, [1,2,3,4]]

    Parameters:
      `self` - an iterable object
    Returns:
      a BufferedIterator for traversing self
    Since:
      2.5.0

  - ### bufferedIterator

    public static <T> BufferedIterator<T> bufferedIterator(List<T> self)
    Returns a `BufferedIterator` that allows examining the next element without consuming it.

         assert [1, 2, 3, 4].bufferedIterator().with { [head(), toList()] } == [1, [1, 2, 3, 4]]

    Parameters:
      `self` - a list
    Returns:
      a BufferedIterator for traversing self
    Since:
      2.5.0

  - ### respondsTo

    public static List<MetaMethod> respondsTo(Object self, String name, Object[] argTypes)

    Returns an object satisfying Groovy truth if the implementing MetaClass responds to a method with the given name and arguments types.

    Note that this method's return value is based on realised methods and does not take into account objects or classes that implement invokeMethod or methodMissing

    This method is "safe" in that it will always return a value and never throw an exception

    Parameters:
      `self` - The object to inspect
      `name` - The name of the method of interest
      `argTypes` - The argument types to match against
    Returns:
      A List of MetaMethods matching the argument types which will be empty if no matching methods exist
    Since:
      1.6.0
    See Also:
      - `MetaObjectProtocol.respondsTo(java.lang.Object, java.lang.String, java.lang.Object[])`

  - ### respondsTo

    public static List<MetaMethod> respondsTo(Object self, String name)

    Returns an object satisfying Groovy truth if the implementing MetaClass responds to a method with the given name regardless of the arguments.

    Note that this method's return value is based on realised methods and does not take into account objects or classes that implement invokeMethod or methodMissing

    This method is "safe" in that it will always return a value and never throw an exception

    Parameters:
      `self` - The object to inspect
      `name` - The name of the method of interest
    Returns:
      A List of MetaMethods matching the given name or an empty list if no matching methods exist
    Since:
      1.6.1
    See Also:
      - `MetaObjectProtocol.respondsTo(java.lang.Object, java.lang.String)`

  - ### hasProperty

    public static MetaProperty hasProperty(Object self, String name)

    Returns true of the implementing MetaClass has a property of the given name

    Note that this method will only return true for realised properties and does not take into account implementation of getProperty or propertyMissing

    Parameters:
      `self` - The object to inspect
      `name` - The name of the property of interest
    Returns:
      The found MetaProperty or null if it doesn't exist
    Since:
      1.6.1
    See Also:
      - `MetaObjectProtocol.hasProperty(java.lang.Object, java.lang.String)`

  - ### withTraits

    public static Object withTraits(Object self, Class<?>... traits)
    Dynamically wraps an instance into something which implements the supplied trait classes. It is guaranteed that the returned object will implement the trait interfaces, but the original type of the object is lost (replaced with a proxy).
    Parameters:
      `self` - object to be wrapped
      `traits` - a list of trait classes
    Returns:
      a proxy implementing the trait interfaces

  - ### swap

    public static <T> List<T> swap(List<T> self, int i, int j)
    Swaps two elements at the specified positions.

    Example:

         assert [1, 3, 2, 4] == [1, 2, 3, 4].swap(1, 2)

    Parameters:
      `self` - a List
      `i` - a position
      `j` - a position
    Returns:
      self
    Since:
      2.4.0
    See Also:
      - `Collections.swap(List, int, int)`

  - ### swap

    public static <T> T[] swap(T[] self, int i, int j)
    Swaps two elements at the specified positions.

    Example:

         assert (["a", "c", "b", "d"] as String[]) == (["a", "b", "c", "d"] as String[]).swap(1, 2)

    Parameters:
      `self` - an array
      `i` - a position
      `j` - a position
    Returns:
      self
    Since:
      2.4.0

  - ### swap

    public static boolean[] swap(boolean[] self, int i, int j)
    Swaps two elements at the specified positions.

    Example:

         assert ([false, true, false, true] as boolean[]) == ([false, false, true, true] as boolean[]).swap(1, 2)

    Parameters:
      `self` - a boolean array
      `i` - a position
      `j` - a position
    Returns:
      self
    Since:
      2.4.0

  - ### swap

    public static byte[] swap(byte[] self, int i, int j)
    Swaps two elements at the specified positions.

    Example:

         assert ([1, 3, 2, 4] as byte[]) == ([1, 2, 3, 4] as byte[]).swap(1, 2)

    Parameters:
      `self` - a boolean array
      `i` - a position
      `j` - a position
    Returns:
      self
    Since:
      2.4.0

  - ### swap

    public static char[] swap(char[] self, int i, int j)
    Swaps two elements at the specified positions.

    Example:

         assert ([1, 3, 2, 4] as char[]) == ([1, 2, 3, 4] as char[]).swap(1, 2)

    Parameters:
      `self` - a boolean array
      `i` - a position
      `j` - a position
    Returns:
      self
    Since:
      2.4.0

  - ### swap

    public static double[] swap(double[] self, int i, int j)
    Swaps two elements at the specified positions.

    Example:

         assert ([1, 3, 2, 4] as double[]) == ([1, 2, 3, 4] as double[]).swap(1, 2)

    Parameters:
      `self` - a boolean array
      `i` - a position
      `j` - a position
    Returns:
      self
    Since:
      2.4.0

  - ### swap

    public static float[] swap(float[] self, int i, int j)
    Swaps two elements at the specified positions.

    Example:

         assert ([1, 3, 2, 4] as float[]) == ([1, 2, 3, 4] as float[]).swap(1, 2)

    Parameters:
      `self` - a boolean array
      `i` - a position
      `j` - a position
    Returns:
      self
    Since:
      2.4.0

  - ### swap

    public static int[] swap(int[] self, int i, int j)
    Swaps two elements at the specified positions.

    Example:

         assert ([1, 3, 2, 4] as int[]) == ([1, 2, 3, 4] as int[]).swap(1, 2)

    Parameters:
      `self` - a boolean array
      `i` - a position
      `j` - a position
    Returns:
      self
    Since:
      2.4.0

  - ### swap

    public static long[] swap(long[] self, int i, int j)
    Swaps two elements at the specified positions.

    Example:

         assert ([1, 3, 2, 4] as long[]) == ([1, 2, 3, 4] as long[]).swap(1, 2)

    Parameters:
      `self` - a boolean array
      `i` - a position
      `j` - a position
    Returns:
      self
    Since:
      2.4.0

  - ### swap

    public static short[] swap(short[] self, int i, int j)
    Swaps two elements at the specified positions.

    Example:

         assert ([1, 3, 2, 4] as short[]) == ([1, 2, 3, 4] as short[]).swap(1, 2)

    Parameters:
      `self` - a boolean array
      `i` - a position
      `j` - a position
    Returns:
      self
    Since:
      2.4.0

  - ### removeAt

    public static <E> E removeAt(List<E> self, int index)
    Modifies this list by removing the element at the specified position in this list. Returns the removed element. Essentially an alias for `List.remove(int)` but with no ambiguity for List<Integer>.

    Example:

         def list = [1, 2, 3]
         list.removeAt(1)
         assert [1, 3] == list

    Parameters:
      `self` - a List
      `index` - the index of the element to be removed
    Returns:
      the element previously at the specified position
    Since:
      2.4.0

  - ### removeElement

    public static <E> boolean removeElement(Collection<E> self, Object o)
    Modifies this collection by removing a single instance of the specified element from this collection, if it is present. Essentially an alias for `Collection.remove(Object)` but with no ambiguity for Collection<Integer>.

    Example:

         def list = [1, 2, 3, 2]
         list.removeElement(2)
         assert [1, 3, 2] == list

    Parameters:
      `self` - a Collection
      `o` - element to be removed from this collection, if present
    Returns:
      true if an element was removed as a result of this call
    Since:
      2.4.0

  - ### getGroovydoc

    public static Groovydoc getGroovydoc(AnnotatedElement holder)
    Get runtime groovydoc
    Parameters:
      `holder` - the groovydoc hold
    Returns:
      runtime groovydoc
    Since:
      2.6.0

  - ### asString

    public static String asString(Throwable self)
    Get the detail information of `Throwable` instance's stack trace
    Parameters:
      `self` - a Throwable instance
    Returns:
      the detail information of stack trace
    Since:
      2.5.3