class AuthorizationsUtil {

    public static Authorizations union(Iterable<byte[]> authorizations1, Iterable<byte[]> authorizations2) {
        LinkedList<byte[]> aggregatedAuthorizations = Lists.newLinkedList();
        addTo(aggregatedAuthorizations, authorizations1);
        addTo(aggregatedAuthorizations, authorizations2);
        return new Authorizations(aggregatedAuthorizations);
    }

}