@override
  void fire(AppEvent event) {
    if (_history.length >= maxHistoryLength) {
      _history.removeAt(0);
    }
    _history.add(EventBusHistoryEntry(event, event.timestamp));
    _lastEvent.add(event);
    _map(event);
    log(' ⚡️ [${event.timestamp}] $event', name: _logName);
  }

class _CustomerManagePageState extends State<CustomerManagePage>


  late var customerViewEventListener;
//............ignore some other code
}

  @override
  void initState() {
    super.initState();
    initEventListeners();
  }

  void initEventListeners() {
    logger().info("initEventListeners");

    customerViewEventListener =
        eventBus().on<CustomerViewEvent>().listen((event) {
        // pop dialog
        });
  }

  @override
  void deactivate() {
    customerViewEventListener.cancel();
    super.deactivate();
  }

Button(
  onPressed: () {
     eventBus().fire(CustomerViewEvent.popCreateDialog());
  }
)

getIt.registerSingleton<EventBus>(EventBus());