(PECL solr >= 2.2.0)
If true, facet counts are based on the most relevant document of each group matching the query.
public SolrQuery SolrQuery::setGroupTruncate ( bool $value )
If true, facet counts are based on the most relevant document of each group matching the query. The server default value is false. group.truncate parameter
Parameters:
value
If true, facet coun