/**
  * Overrides RestfulEntityBaseNode::addExtraInfoToQuery()
  * 
  * Adds proper query tags
  */
 protected function addExtraInfoToQuery($query) {
   parent::addExtraInfoToQuery($query);
   $filters = $this->parseRequestForListFilter();
   if (!empty($filters)) {
     $addTag = FALSE;
     foreach ($filters as $filter) {
       if ($filter['public_field'] == 'parent') {
         $addTag = TRUE;
       }
     }
     if ($addTag == TRUE) {
       $query->addTag('hr_locations_filter_parent');
     }
   }
 }