void markersChanged(Program p) {
		MarkerSetCacheEntry entry = markerSetCache.get(p);
		if (entry != null) {
			entry.colorCache.clear();
		}
		updater.update();
	}
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