code: private void createResponse() {
          response = new GenericQueryResponse(
              queryErrorObservable.onBackpressureBuffer(),
              queryRowObservable.onBackpressureBuffer(),
              querySignatureObservable.onBackpressureBuffer(),
              queryStatusObservable.onBackpressureBuffer(),
              queryInfoObservable.onBackpressureBuffer(),
              queryProfileInfoObservable.onBackpressureBuffer(),
              currentRequest,
              status,
              requestID,
              clientContextID
          );
      }
docs: Helper method to initialize the internal response structure once ready.