@DwrPermission(admin = true)
  public ProcessResult toggleMaintenanceEvent(int id) {
    ProcessResult response = new ProcessResult();

    MaintenanceEventRT rt = RTMDefinition.instance.getRunningMaintenanceEvent(id);
    boolean activated = false;
    if (rt == null)
      response.addMessage(new TranslatableMessage("maintenanceEvents.toggle.disabled"));
    else activated = rt.toggle();

    response.addData("activated", activated);

    return response;
  }