# Package org.apache.groovy.internal.util

- Interface Summary
  Interface | Description
  --- | ---
  Function<T,R> | Backport of Java8 Function.
  Supplier<T> | Backport of Java8 Supplier.

- Class Summary
  Class | Description
  --- | ---
  ReevaluatingReference<T> | This class represents a reference to the most actual incarnation of a Metaclass.
  UncheckedThrow | Allows to throw a checked exception unchecked.