public TimelineNode(PlayableGraph graph, GameObject owner, IEnumerable <TrackAsset> tracks)
{
var trackAssets = tracks as TrackAsset[] ?? tracks.ToArray();
timelinePlayable = TimelinePlayable.Create(graph, trackAssets, owner, true, false);
timelinePlayable.SetOutputCount(trackAssets.Length);
outputTypes = DetermineOutputTypes(trackAssets);
}