@Override
	public void init() {
		markerService = tool.getService(MarkerService.class);
		updateManager = new SwingUpdateManager(1000, () -> updateChangeMarkers());
	}
Manages the markers to display areas where changes have occurred
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/misc/MyProgramChangesDisplayPlugin.java