SolrQuery::setEchoParams Determines what kind of parameters to include in the response &reftitle.description; public SolrQuerySolrQuery::setEchoParams stringtype Instructs Solr what kinds of Request parameters should be included in the response for debugging purposes, legal values include: &reftitle.parameters; type The type of parameters to include &reftitle.returnvalues; Returns the current SolrQuery object, if the return value is used.