code: public Observable<InputStream> getRunbookContentAsync(String resourceGroupName, String automationAccountName, String jobId) {
          return getRunbookContentWithServiceResponseAsync(resourceGroupName, automationAccountName, jobId).map(new Func1<ServiceResponse<InputStream>, InputStream>() {
              @Override
              public InputStream call(ServiceResponse<InputStream> response) {
                  return response.body();
              }
          });
      }
docs: Retrieve the runbook content of the job identified by job id.
  
  @param resourceGroupName Name of an Azure Resource group.
  @param automationAccountName The name of the automation account.
  @param jobId The job id.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the InputStream object