to.cachedSubject = from.cachedSubject;
    }


    /**
     * {@inheritDoc}
     *
     * @see jcifs.smb.Kerb5Authenticator#refresh()
     */
    @Override
    public void refresh () throws CIFSException {
        log.debug("Refreshing JAAS credentials");
        this.cachedSubject = null;
    }


    /**
     * {@inheritDoc}
     *