for (final T value : newValues) {
            if (!dest.contains(value)) {
                dest.add(value);
            }
        }
    }

    protected static Kind[] concatKinds(final Kind[] kinds, final Kind... newKinds) {
        if (kinds == null) {
            return newKinds;
        }
        if (newKinds == null) {
            return kinds;
        }