private void stopVertexTwinkleAnimation() {
		if (vertexTwinkleAnimator != null) {
			vertexTwinkleAnimator.stop();
			vertexTwinkleAnimator = null;
		}
	}
Returns true if this updater is running any jobs that can mutate the graph or view

@return true if busy
Ghidra/Framework/Graph/src/main/java/ghidra/graph/viewer/VisualGraphViewUpdater.java