/**
  * Store the form's values to this folder's permissions.
  * @param FOLDER $obj
  * @access private
  */
 public function commit($obj)
 {
     $security = $obj->security_definition();
     if ($security->inherited()) {
         $security->copy_and_store($this->value_for('copy_mode'));
     } else {
         $security->purge();
     }
 }