static void AddMarkerToParent(ScriptableObject marker, TrackAsset parent)
{
TimelineCreateUtilities.SaveAssetIntoObject(marker, parent);
TimelineUndo.RegisterCreatedObjectUndo(marker, "Duplicate Marker");
TimelineUndo.PushUndo(parent, "Duplicate Marker");
if (parent != null)
{
parent.AddMarker(marker);
((IMarker)marker).Initialize(parent);
}
}