public void OnCommentsReceived(IEnumerable <CommentVotingModel> comments)
        {
            var list = new ObservableCollection <CommentViewState>();

            foreach (var item in comments)
            {
                var vs = new CommentViewState {
                    IconSource = "person.png",
                    Title      = item.Actor,
                    Message    = item.Message
                };
                list.Add(vs);
            }
            DetailViewModel.ViewState.Push((nameof(DetailViewModel.ViewState.Comments), list));
            PullToRefresh.IsRefreshing = false;
        }
 void OnItemSelected(CommentViewState obj)
 {
 }