@Override
    public Kerb5Authenticator clone () {
        Kerb5Authenticator auth = new Kerb5Authenticator(getSubject());
        cloneInternal(auth, this);
        return auth;
    }


    /**
     * Clone the context
     * 
     * @param to
     * @param from
     */
    public static void cloneInternal ( Kerb5Authenticator to, Kerb5Authenticator from ) {

    }


    @Test
    public void testFallback () throws Exception {
        Subject s = getInitiatorSubject(getTestUser(), getTestUserPassword(), getTestUserDomainRequired(), null);
        Kerb5Authenticator auth = new Kerb5Authenticator(s, getTestUserDomainRequired(), getTestUser(), getTestUserPassword());
        auth.setForceFallback(true);
        CIFSContext ctx = getContext().withCredentials(auth);