if (change == null)
if (change == null) {
	void recordBundleAdded(BundleDescriptionImpl added) {		Object key = added.getKey();		BundleDeltaImpl change = (BundleDeltaImpl) changes.get(key);		if (change == null)			changes.put(key, new BundleDeltaImpl(added, BundleDelta.ADDED));		else			change.setType(change.getType() | BundleDelta.ADDED);	}