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