}

    protected OptionalEntity<User> facadeSelectByPK(String id) {
        return doSelectOptionalByPK(id, typeOfSelectedEntity());
    }

    protected <ENTITY extends User> ENTITY doSelectByPK(String id, Class<? extends ENTITY> tp) {
        return doSelectEntity(xprepareCBAsPK(id), tp);
    }

    protected UserCB xprepareCBAsPK(String id) {
        assertObjectNotNull("id", id);