private function loadRow(Gpf_DbEngine_Row $row, $rowName) {
     try {
         $row->load();
     } catch (Gpf_DbEngine_NoRowException $e) {
         throw new Gpf_Exception($this->_('%s with id %s not exist', $rowName, $row->getPrimaryKeyValue()));
     }
 }
 protected function deleteRow(Gpf_DbEngine_Row $row)
 {
     $row->load();
     $row->delete();
 }