public function NotificationGetNotificationsById(CbgrnNotificationIdType $notification_id)
 {
     // $notification_id : CbgrnNotificationIdType class (only one)
     $this->CheckAndSetHeader(__FUNCTION__);
     $reg_args["notification_id"] = $notification_id;
     $this->encodeString($reg_args);
     $results = parent::NotificationGetNotificationsById($reg_args);
     $this->methodClose();
     return $this->decodeString($results->notification);
 }