anchor.diff:      super.initState();
       _getBranchList();
       _refresh();
  +    animationController =
  +        new AnimationController(vsync: this, duration: Duration(seconds: 2));
  +    animationController.forward();
     }
   
     @override
  
positive.code:             onPageChanged: (index) {
                reposDetailModel.setCurrentIndex(index);
              },
              floatingActionButton: FloatingActionButton(
                onPressed: () {
                  _createIssue();
                },
                child: Icon(Icons.add),
                backgroundColor: Theme.of(context).primaryColor,
              ),
              floatingActionButtonLocation:
                  FloatingActionButtonLocation.endDocked,
  
negative.code:   _RepositoryDetailPageState createState() => _RepositoryDetailPageState();
  }
  
  class _RepositoryDetailPageState extends State<RepositoryDetailPage>
      with SingleTickerProviderStateMixin {
    ReposHeaderViewModel reposHeaderViewModel = new ReposHeaderViewModel();
  
    BottomStatusModel bottomStatusModel;
  