Future<bool> pop({String uniqueId, Object result}) async {
  BoostContainer container;
  if (uniqueId != null) {
    container = _findContainerByUniqueId(uniqueId);
    if (container == null) {
      Logger.error('uniqueId=$uniqueId not found');
      return false;
    }
    if (container != topContainer) {
      await _removeContainer(container);
      return true;
    }
  } else {
    container = topContainer;
  }

  final currentPage = topContainer?.topPage?.pageInfo?.uniqueId;
  assert(currentPage != null);
  _completePendingResultIfNeeded(currentPage);

  // 1.If uniqueId == null,indicate we simply call BoostNavigaotor.pop(),
  // so we call navigator?.maybePop();
  // 2.If uniqueId is topPage's uniqueId, so we navigator?.maybePop();
  // 3.If uniqueId is not topPage's uniqueId, so we will remove an existing
  // page in container.
  if (uniqueId == null ||
      uniqueId == container.pages.last.pageInfo.uniqueId) {
    final handled = await container?.navigator?.maybePop(result);
    if (handled != null && !handled) {
      assert(container.pageInfo.withContainer);
      final params = CommonParams()
        ..pageName = container.pageInfo.pageName
        ..uniqueId = container.pageInfo.uniqueId
        ..arguments =
            (result is Map<String, dynamic>) ? result : <String, dynamic>{};
      await nativeRouterApi.popRoute(params);
    }
  } else {
    final page = container.pages.singleWhere(
        (entry) => entry.pageInfo.uniqueId == uniqueId,
        orElse: () => null);
    container.removePage(page);
  }

  Logger.log('pop container, uniqueId=$uniqueId, result:$result, $container');
  return true;
}