public final Collection getCollection(Identifier ident) {
		if (ident instanceof PackageIdentifier)
			return packs;
		else if (ident instanceof ClassIdentifier)
			return clazzes;
		else if (ident instanceof MethodIdentifier)
			return methods;
		else if (ident instanceof FieldIdentifier)
			return fields;
		else if (ident instanceof LocalIdentifier)
			return locals;
		else
			throw new IllegalArgumentException(ident.getClass().getName());
	}