bottomNavigationBar: BottomNavigationBar(
        type: BottomNavigationBarType.fixed,
        items: <BottomNavigationBarItem>[
          BottomNavigationBarItem(
            icon: Icon(Icons.calendar_today, ),
            title: Container(),
          ),
          BottomNavigationBarItem(
            icon: Icon(Icons.calendar_today,),
            title: Container(),
          ),
          BottomNavigationBarItem(
            icon: Icon(Icons.calendar_today, ),
            title: Container(),
          ),
          BottomNavigationBarItem(
            icon: Icon(Icons.calendar_today, ),
            title: Container(),
          ),
          BottomNavigationBarItem(
            icon: Icon(Icons.calendar_today, ),
            title: Container(),
          ),
        ],
      ),