onInit method Null safety
override
    Listens to streams to ensure race statuses are updated
Implementation
@override
void onInit() {
  // countdown.restoreInitialCompletion();
  CombineLatestStream.list<dynamic>([
    countdown.completion$.stream,
    countdown.completed.stream,
  ]).listen((value) {
    updateRaceStatus();
  });
  super.onInit();
}