/**
  * 公開範囲更新
  *
  * @param  $new_open_level_code
  * @param  $new_trusted_community_row_array
  * @return $ret
  */
 function update_open_level_code($new_open_level_code, $new_trusted_community_row_array)
 {
     $ret = ACSFolderModel::update_folder_open_level_code($this->get_folder_id(), $new_open_level_code, $new_trusted_community_row_array);
     return $ret;
 }