* Test witness client that allows injection of mock RPC client
     */
    private static class TestWitnessClient extends WitnessClient {

        public TestWitnessClient(InetAddress witnessServer, CIFSContext context, WitnessRpcClient rpcClient) {
            super(witnessServer, context, rpcClient);
        }

        // TestWitnessClient can use the parent implementation now since we inject the mock RPC client
    }