static void MoveToTrack_Impl(TimelineClip clip, TrackAsset destinationTrack, Object asset, TrackAsset parentTrack)
        {
            TimelineUndo.PushUndo(asset, k_UndoSetParentTrackText);
            if (parentTrack != null)
            {
                TimelineUndo.PushUndo(parentTrack, k_UndoSetParentTrackText);
            }

            TimelineUndo.PushUndo(destinationTrack, k_UndoSetParentTrackText);

            clip.SetParentTrack_Internal(destinationTrack);

            if (parentTrack == null)
            {
                TimelineCreateUtilities.SaveAssetIntoObject(asset, destinationTrack);
            }
            else if (parentTrack.timelineAsset != destinationTrack.timelineAsset)
            {
                TimelineCreateUtilities.RemoveAssetFromObject(asset, parentTrack);
                TimelineCreateUtilities.SaveAssetIntoObject(asset, destinationTrack);
            }
        }