@Override
		public void taskGroupScheduled(GTaskGroup group) {
			runnableQueue.add(new TaskGroupScheduledRunnable(group));
			updateManager.update();
		}
Uses a layered pane to create a "watermark effect" to show when the GTaskManger is suspended.
Ghidra/Framework/Project/src/main/java/ghidra/framework/task/gui/taskview/TaskViewer.java