Future<T> pendNativeResult<T extends Object>(String pageName) {
  final completer = Completer<T>();
  final initiatorPage = topContainer?.topPage?.pageInfo?.uniqueId;
  final key = '$initiatorPage#$pageName';
  _pendingResult[key] = completer;
  Logger.log('pendNativeResult, key:$key, size:${_pendingResult.length}');
  return completer.future;
}