anchor.diff:            decoration: new BoxDecoration(
                 border: new Border(top: new BorderSide(color: Theme
                     .of(context)
  -                  .dividerColor
  -              ))),
  +                  .dividerColor))),
             child: new Padding(
                 padding: const EdgeInsets.all(32.0),
                 child: new Text(_selectedPage.information, style: Theme
  
positive.code:           showDialog(context: context, child: new RefreshProgressDialog(
                CodeWarsColors.black.shade100, width: 100, height: 100));
            get(CodeWarsAPI.getUser(_usernameEditingController.text))
                .then((val) {
              setState(() {
                var json = new JsonDecoder(null).convert(val.body);
                _user.username = json['username'];
                _user.name = json['name'];
                _user.honor = json['honor'];
                _user.leaderboardPosition = json['leaderboardPosition'];
                _user.skills = json['skills'];
                if (null == _user.skills || _user.skills.isEmpty) {
                  _user.skills = const[" no skills found "];
                }
              });
              Navigator.pop(context);
            });
          }, child: new Text("OK")),
        ], title: new Text("Reset your username"),);
      showDialog(context: context, child: dialog);
  
negative.code: 
    Widget buildTabView(_Page page) =>
        new Container(
            key: new ValueKey<String>(page.tabLabel),
            color: _background,
            padding: const EdgeInsets.fromLTRB(8.0, 8.0, 8.0, 32.0),
            child: page.childWight);
  
    _changeUserName() {
      var dialog = new SimpleDialog(
  