code: public Observable<ServiceResponse<UserInner>> getPublishingUserWithServiceResponseAsync() {
          if (this.apiVersion() == null) {
              throw new IllegalArgumentException("Parameter this.apiVersion() is required and cannot be null.");
          }
          return service.getPublishingUser(this.apiVersion(), this.acceptLanguage(), this.userAgent())
              .flatMap(new Func1<Response<ResponseBody>, Observable<ServiceResponse<UserInner>>>() {
                  @Override
                  public Observable<ServiceResponse<UserInner>> call(Response<ResponseBody> response) {
                      try {
                          ServiceResponse<UserInner> clientResponse = getPublishingUserDelegate(response);
                          return Observable.just(clientResponse);
                      } catch (Throwable t) {
                          return Observable.error(t);
                      }
                  }
              });
      }
docs: Gets publishing user.
  Gets publishing user.
  
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the UserInner object