private async void InitializeAsync(string questionId, string testId)
 {
     await Task.Run(() => {
         _creatorViewModel = new TestCreatorViewModel(Repository.Type.Stack, questionId, testId)
         {
             GridButtons = GridButtons, Page = this
         };
         Device.BeginInvokeOnMainThread(() => BindingContext = _creatorViewModel);
     });
 }
 private async void InitializeAsync(string questionId, string testId)
 {
     await Task.Run(() => {
         var creatorViewModel = new TestCreatorViewModel(Repository.Type.Entry, questionId, testId)
         {
             Page = this
         };
         Device.BeginInvokeOnMainThread(() => { BindingContext = creatorViewModel; });
     });
 }