@Override
	public EventQueueID createPrivateEventQueue(DomainObjectListener listener, int maxDelay) {
		EventQueueID eventQueueID = new EventQueueID();
		DomainObjectChangeSupport queue = new DomainObjectChangeSupport(this, maxDelay, lock);
		queue.addListener(listener);
		changeSupportMap.put(eventQueueID, queue);
		return eventQueueID;
	}
Return "changed" status

@return true if this object has changed
Ghidra/Framework/Project/src/main/java/ghidra/framework/data/DomainObjectAdapter.java