anchor.diff:              child: new Text(
                 "Delete",
                 style: new TextStyle(color: Colors.red),),
  -            onPressed: () {
  -              _friendUsers.remove(user);
  -            }),)
  +            onPressed: () => setState(() => _friendUsers.remove(user))),)
         ],)).toList();
       _friendsView.add(new ListTile(
         isThreeLine: true,
  
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:         tooltip: "Add friend",
          icon: new Icon(_isRefreshingNewFriend ? Icons.adjust : Icons.done),
          onPressed: () {
            setState(() => _isRefreshingNewFriend = true);
            get(CodeWarsAPI.getUser(_friendNameController.text))
              ..then((val) =>
                  setState(() {
  