code: public Observable<JobResponseInner> getJobAsync(String resourceGroupName, String resourceName, String jobId) {
          return getJobWithServiceResponseAsync(resourceGroupName, resourceName, jobId).map(new Func1<ServiceResponse<JobResponseInner>, JobResponseInner>() {
              @Override
              public JobResponseInner call(ServiceResponse<JobResponseInner> response) {
                  return response.body();
              }
          });
      }
docs: Get the details of a job from an IoT hub. For more information, see: https://docs.microsoft.com/azure/iot-hub/iot-hub-devguide-identity-registry.
  Get the details of a job from an IoT hub. For more information, see: https://docs.microsoft.com/azure/iot-hub/iot-hub-devguide-identity-registry.
  
  @param resourceGroupName The name of the resource group that contains the IoT hub.
  @param resourceName The name of the IoT hub.
  @param jobId The job identifier.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the JobResponseInner object