void dispatchGlobalPageShowEvent(Route<dynamic> route) {
  if (route == null) {
    return;
  }
  final globalObserversList = _globalListeners.toList();

  for (var observer in globalObserversList) {
    observer.onPageShow(route);
  }

  Logger.log('page_visibility, #dispatchGlobalPageShowEvent, '
      '${route.settings.name}');
}