anchor.diff:  }
   
   class TabNavigationHelper {
  +  Map<AppTab, GlobalKey<NavigatorState>> navigatorKeys = {
  +    AppTab.profile: GlobalKey<NavigatorState>(),
  +    AppTab.runs: GlobalKey<NavigatorState>(),
  +    AppTab.futureEvents: GlobalKey<NavigatorState>(),
  +    AppTab.pastEvents: GlobalKey<NavigatorState>(),
  +    AppTab.offlineChart: GlobalKey<NavigatorState>()
  +  };
  +
     _HomeState _home;
   
     TabNavigationHelper(this._home);
  
positive.code: class _HomeState extends State<Home> {
    static const TextStyle optionStyle =
        TextStyle(fontSize: 30, fontWeight: FontWeight.bold);
    static final List<Widget> _widgetOptions = <Widget>[
      TabNavigator(
        navigatorKey: navigatorKeys[AppTab.profile],
        routes: {
          '/': (context) => ProfileDashboard(),
        },
      ),
      TabNavigator(
        navigatorKey: navigatorKeys[AppTab.runs],
        routes: {
          '/': (context) => UserRunsPage(),
          '/run-details': (context) => RunDetailsPage(),
        },
      ),
      TabNavigator(
        navigatorKey: navigatorKeys[AppTab.pastEvents],
        routes: {
          '/': (context) => PastEventsPage(),
          '/event-results': (context) => EventResultsPage(),
        },
      ),
      TabNavigator(
        navigatorKey: navigatorKeys[AppTab.futureEvents],
        routes: {
          '/': (context) => FutureEventsPage(),
        },
      ),
      TabNavigator(
        navigatorKey: navigatorKeys[AppTab.offlineChart],
        routes: {
          '/': (context) => OfflineChartPage(),
        }
      )
    ];
  
    int _selectedIndex = 0;
    TabNavigationHelper _tabHelper;
  
    set selectedIndex(value) {
      if (value != _selectedIndex) {
  
negative.code:             ),
              BottomNavigationBarItem(
                icon: Icon(CustomIcons.award),
                title: Text('Офлайн Класация'),
              ),
            ],
            currentIndex: _selectedIndex,
            onTap: _onItemTapped,
  