SolrQuery::addStatsFacet Requests a return of sub results for values within the given facet &reftitle.description; public SolrQuerySolrQuery::addStatsFacet stringfield Requests a return of sub results for values within the given facet. Maps to the stats.facet field &reftitle.parameters; field The name of the field &reftitle.returnvalues; Returns the current SolrQuery object, if the return value is used.