@Override
	public boolean isActiveMarkerForGroup(String groupName, MarkerSet markerSet, Program program) {
		Map<Program, MarkerSetImpl> markersByProgram = programMarkersByGroup.get(groupName);
		MarkerSetImpl previousMarkers = markersByProgram.get(program);
		return markerSet == previousMarkers;
	}
Call to signal that the markers for a given program have changed in some way, such as being
removed, changing colors or the active state being changed

@param p the program associated with the markers
Ghidra/Features/Base/src/main/java/ghidra/app/plugin/core/marker/MarkerManager.java