public void RemoveClocks(IEnumerable <AnimationTimelineClock> newClocks, AnimationLayerKey key) { AnimationLayer animationLayer = GetAnimationLayer(key); animationLayer.RemoveClocks(newClocks); if (key != AnimationLayerKey.Default && animationLayer.IsEmpty) { RemoveAnimationLayer(key); } LayerInvalidated.Raise(this); }