// PUT
Greeting greeting = new Greeting(greetingResponse.getEntity().getResults().get(1L).getEntity().data().copy());
greeting.setMessage("This is a new message!");
Request<BatchKVResponse<Long, UpdateStatus>> writeRequest = builders.batchUpdate().input(1L, greeting).build();
REST_CLIENT.sendRequest(writeRequest).getResponse();
// GET again, to verify that our POST worked.
Request<BatchKVResponse<Long, EntityResponse<Greeting>>> request2 = batchGetBuilder.ids(1L).build();
ResponseFuture<BatchKVResponse<Long, EntityResponse<Greeting>>> future2 = REST_CLIENT.sendRequest(request2);