## Uses of Class
org.apache.lucene.search.grouping.AbstractFirstPassGroupingCollector

- Packages that use AbstractFirstPassGroupingCollector
  Package | Description
  --- | ---
  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 AbstractFirstPassGroupingCollector in org.apache.lucene.search.grouping.function

    Subclasses of AbstractFirstPassGroupingCollector in org.apache.lucene.search.grouping.function
    Modifier and Type | Class and Description
    --- | ---
    `class` | `FunctionFirstPassGroupingCollector` Concrete implementation of `AbstractFirstPassGroupingCollector` that groups based on `ValueSource` instances.

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

    Subclasses of AbstractFirstPassGroupingCollector in org.apache.lucene.search.grouping.term
    Modifier and Type | Class and Description
    --- | ---
    `class` | `TermFirstPassGroupingCollector` Concrete implementation of `AbstractFirstPassGroupingCollector` that groups based on field values and more specifically uses `SortedDocValues` to collect groups.

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