private void RadChat_ReportMessageResult(object sender, MessageResultEventArgs e)
 {
     if (e.Message is ListMessage lm && e.PropertyName == nameof(ListView.SelectedItems))
     {
         var listView = this.chat.ChildrenOfType<ListView>().FirstOrDefault(x => x.DataContext == e.Message);
         if (listView != null)
         {
             IList<object> selection = listView.SelectedItems;
         }
     }
 }