reportRouteWillDispose static method 
    
      
void
reportRouteWillDispose(
 - Route disposed
) 
    
    
  Implementation
  static void reportRouteWillDispose(Route disposed) {
  final keysToRemove = <String>[];
  _routesKey[disposed]?.forEach(keysToRemove.add);
  /// Removes `Get.create()` instances registered in `routeName`.
  if (_routesByCreate.containsKey(disposed)) {
    for (final onClose in _routesByCreate[disposed]!) {
      // assure the [DisposableInterface] instance holding a reference
      // to onClose() wasn't disposed.
      onClose();
    }
    _routesByCreate[disposed]!.clear();
    _routesByCreate.remove(disposed);
  }
  for (final element in keysToRemove) {
    GetInstance().markAsDirty(key: element);
    //_routesKey.remove(element);
  }
  keysToRemove.clear();
}