## Uses of Class
org.apache.lucene.search.grouping.AbstractAllGroupHeadsCollector.GroupHead

- Packages that use AbstractAllGroupHeadsCollector.GroupHead
  Package | Description
  --- | ---
  org.apache.lucene.search.grouping | Grouping.
  org.apache.lucene.search.grouping.function | Support for grouping by `ValueSource`.
  org.apache.lucene.search.grouping.term | Support for grouping by indexed terms via `DocValues`.

- - ### Uses of AbstractAllGroupHeadsCollector.GroupHead in org.apache.lucene.search.grouping

    Classes in org.apache.lucene.search.grouping with type parameters of type AbstractAllGroupHeadsCollector.GroupHead
    Modifier and Type | Class and Description
    --- | ---
    `class` | `AbstractAllGroupHeadsCollector<GH extends AbstractAllGroupHeadsCollector.GroupHead>` This collector specializes in collecting the most relevant document (group head) for each group that match the query.

    Fields in org.apache.lucene.search.grouping declared as AbstractAllGroupHeadsCollector.GroupHead
    Modifier and Type | Field and Description
    --- | ---
    `GH` | AbstractAllGroupHeadsCollector.TemporalResult.`groupHead`

  - ### Uses of AbstractAllGroupHeadsCollector.GroupHead in org.apache.lucene.search.grouping.function

    Subclasses of AbstractAllGroupHeadsCollector.GroupHead in org.apache.lucene.search.grouping.function
    Modifier and Type | Class and Description
    --- | ---
    `class` | `FunctionAllGroupHeadsCollector.GroupHead` Holds current head document for a single group.

  - ### Uses of AbstractAllGroupHeadsCollector.GroupHead in org.apache.lucene.search.grouping.term

    Classes in org.apache.lucene.search.grouping.term with type parameters of type AbstractAllGroupHeadsCollector.GroupHead
    Modifier and Type | Class and Description
    --- | ---
    `class` | `TermAllGroupHeadsCollector<GH extends AbstractAllGroupHeadsCollector.GroupHead<?>>` A base implementation of `AbstractAllGroupHeadsCollector` for retrieving the most relevant groups when grouping on a string based group field.

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