private function _set_query_args()
 {
     $params = DispletRetsIdxEmailTemplatesModel::get_api_params();
     if (!empty($params) && is_array($params)) {
         foreach ($params as $param) {
             if (isset($this->_model[$param]) || $this->_model[$param] === null) {
                 $this->_model['query_args'][$param] = $this->_model[$param];
             }
         }
     }
 }