code: public void sendAdminNotification(NotificationType type,
                                        String subject,
                                        String message) {
          for (Notifier notifier : notifiers) {
              if (notifier.getNotificationType().equals(type)) {
                  notifier.notifyAdmins(subject, message);
              }
          }
      }
docs: Sends a notification to system administrators through all configured
  notifiers of a given type.
  
  @param type    of notification to be sent
  @param subject of the notification
  @param message of the notification