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