code: protected function _saveModel(Benri_Db_Table_Row &$model, $data = null)
      {
          return parent::_saveModel($model, $data ?: $this->_input);
      }
docs: General method to save models (Benri_Db_Table_Row).
  
  @param Benri_Db_Table_Row
  @return Benri_Controller_Rest