How to get the dropped item group in Xamarin.Forms ListView (SfListView)

namespace ListViewXamarin
{
    public class Behavior : Behavior<ContentPage>
    {
        SfListView ListView;
 
        protected override void OnAttachedTo(ContentPage bindable)
        {
            ListView = bindable.FindByName<SfListView>("listView");
            ListView.ItemDragging += ListView_ItemDragging;
 
            base.OnAttachedTo(bindable);
        }
 
        private void ListView_ItemDragging(object sender, ItemDraggingEventArgs e)
        {
            if (e.Action == DragAction.Drop)
            {
                int dropIndex = e.NewIndex;
                var dropItem = ListView.DataSource.DisplayItems[dropIndex];
                var dropedGroup = GetGroup(dropItem, e);
 
                App.Current.MainPage.DisplayAlert("Dropped group", "" + dropedGroup.Key, "Ok");
            }
        }
 
        public GroupResult GetGroup(object itemData, ItemDraggingEventArgs args)
        {
            GroupResult itemGroup = null;
 
            foreach (var item in this.ListView.DataSource.DisplayItems)
            {
                if(itemData is GroupResult)
                {
                    if (args.OldIndex > args.NewIndex && item == itemData) break;
                    if (item is GroupResult) itemGroup = item as GroupResult;
                    if (args.OldIndex < args.NewIndex && item == itemData) break;
                }
                else
                {
                    if (item == itemData) break;
                    if (item is GroupResult) itemGroup = item as GroupResult;
                }
            }
            return itemGroup;
        }
    }
}