// import 'route_history.dart';
//
// class RouteHistoryManager{
//   final List<RouteHistory> _histories = [];
//   final List<RouteHistory> _backHistories = [];
//
//   List<RouteHistory> get histories => _histories.reversed.toList();
//
//   bool get hasHistory => _histories.length > 1;
//
//   bool get hasBackHistory => _backHistories.isNotEmpty;
// }