public void programTreeAdded(long id, ProgramEvent eventType, Object oldValue,
			Object newValue) {
		if (recordChanges) {
			((ProgramDBChangeSet) changeSet).programTreeAdded(id);
		}
		changed = true;
		fireEvent(new ProgramChangeRecord(eventType, null, null, null, oldValue, newValue));
	}
Notification that a program tree was added.
@param id the id of the program tree that was added.
@param eventType the type of change
@param oldValue old value is null
@param newValue new value depends the tree that was added.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/ProgramDB.java