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

- - ### Uses of GroupReducer in org.apache.lucene.search.grouping

    Fields in org.apache.lucene.search.grouping declared as GroupReducer
    Modifier and Type | Field | Description
    --- | --- | ---
    `protected GroupReducer<T,​?>` | SecondPassGroupingCollector.`groupReducer` |

    Constructors in org.apache.lucene.search.grouping with parameters of type GroupReducer
    Constructor | Description
    --- | ---
    `SecondPassGroupingCollector​(GroupSelector<T> groupSelector, Collection<SearchGroup<T>> groups, GroupReducer<T,​?> reducer)` | Create a new SecondPassGroupingCollector