anchor.diff:    _Page _friends;
     _Page _kata;
     _Page _me;
  -
  -  _MainActivity(this._title);
  -
     TabController _tabController;
     CodeWarsUser _user;
  +  CodeWarsUser _refreshingFriend;
     List<CodeWarsUser> _friendUsers = [];
     _Page _selectedPage;
  +
  +  _MainActivity(this._title);
   
     _changeTheBossOfThisGym() {
       SharedPreferences.getInstance().then((sp) {
  
positive.code:     }
      List<Widget> _friendsView = _friendUsers.map((user) =>
      new ExpansionTile(
        leading: new IconButton(icon: const Icon(Icons.refresh), onPressed: () {
          get(CodeWarsAPI.getUser(user.username))
            ..then((val) =>
                setState(() {
                  int index = _friendUsers.indexOf(user);
                  _friendUsers.removeAt(index);
                  _friendUsers.insert(index, _json2user(val.body));
                  // TODO add him to the database
                }))
            ..timeout(new Duration(seconds: 10))
            ..catchError(() => setState(_pop));
        },),
        title: new ListTile(
          title: new Text(
            user.name,
  
negative.code:             child: new Text(
                "Delete",
                style: new TextStyle(color: Colors.red),),
              onPressed: () => setState(() => _friendUsers.remove(user))),)
        ],)).toList();
      _friendsView.add(new ListTile(
        isThreeLine: true,
  