private void AppendItems(IEnumerable <TrackViewModel> items, Action <Dictionary <SynoTrack, Guid> > callback)
{
var tracks = items.Select(o => o.TrackInfo);
// int insertPosition = _playbackService.GetTracksCountInQueue();
int insertPosition = PlayQueueItems.Count();
_playbackService.InsertTracksToQueue(tracks, insertPosition, callback);
//foreach (var trackViewModel in items)
//{
// PlayQueueItems.Add(trackViewModel);
//}
}