@Override
	public boolean hasChanges() {
		if (changedDataTypeIds.isEmpty() && changedCategoryIds.isEmpty() &&
			changedSourceArchiveIds.isEmpty() && addedDataTypeIds.isEmpty() &&
			addedCategoryIds.isEmpty() && addedSourceArchiveIds.isEmpty()) {
			return false;
		}
		return true;
	}
Construct a new DataTypeArchiveChangeSet.
@param addrMap the address map.
@param numUndos the number of undo change sets to track.
Ghidra/Framework/SoftwareModeling/src/main/java/ghidra/program/database/DataTypeArchiveDBChangeSet.java