/**
  * @param Pocketphp_Elasticsearch_Model_Query_Abstract $query
  */
 protected function _setQueryFields(Pocketphp_Elasticsearch_Model_Query_Abstract $query)
 {
     $searchedFields = $this->_getSearchFields();
     if (count($searchedFields) > 0) {
         $query->setFields($searchedFields);
     } else {
         $query->setDefaultField('_all');
     }
 }