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


    /**
     * Clone the context
     * 
     * @param to
     * @param from
     */
    protected static void cloneInternal ( JAASAuthenticator to, JAASAuthenticator from ) {
        Kerb5Authenticator.cloneInternal(to, from);