/**
         * Called when a witness registration expires.
         *
         * @param registration the expired registration
         */
        void onRegistrationExpired(WitnessRegistration registration);
    }

    /**
     * Creates a new witness client.
     *
     * @param witnessServer the witness server address
     * @param context the CIFS context

    public interface WitnessNotificationListener {
        void onWitnessNotification(WitnessNotification notification);
        void onRegistrationFailed(WitnessRegistration registration, Exception error);
        void onRegistrationExpired(WitnessRegistration registration);
    }
    
    public WitnessClient(InetAddress witnessServer, CIFSContext context) {
        this.witnessServer = witnessServer;
        this.port = DEFAULT_WITNESS_PORT;

        @Override
        public void onRegistrationFailed(WitnessRegistration registration, Exception error) {
            // Test implementation
        }

        @Override
        public void onRegistrationExpired(WitnessRegistration registration) {
            // Test implementation
        }

        public boolean waitForNotification(long timeoutMs) throws InterruptedException {