@Override
			public void end() {
				AbstractTaskInfo element = scrollAwayList.pop();
				runningList.remove(element);
				updateComponent();
				SwingUtilities.invokeLater(animationRunnable);
			}
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