public void tagChanged(FunctionTag tag, ProgramEvent eventType, Object oldValue,
			Object newValue) {
		if (recordChanges) {
			long tagID = tag.getId();
			((ProgramDBChangeSet) changeSet).tagChanged(tagID);
		}
		changed = true;
		fireEvent(new ProgramChangeRecord(eventType, null, null, tag, oldValue, newValue));
	}
Notification that a {@link FunctionTag} was changed. This can be either an
edit or a delete.

@param tag the tag that was changed.
@param eventType the type of change
@param oldValue old value 
@param newValue new value
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/ProgramDB.java