private void CatrobatListView_OnItemTapped(object sender, CatrobatListViewItemEventArgs e)
 {
     _viewModel.AddNewScriptBrickCommand.Execute(e.GetTappedItem().Content as ModelBase);
 }
 void Clvw_ItemTapped(object sender, CatrobatListViewItemEventArgs e)
 {
     if (ItemTapped != null)
     {
         ItemTapped(sender, e);
     }
 }