code: public Observable<Object> listSwaggerAsync(String resourceGroupName, String workflowName) {
          return listSwaggerWithServiceResponseAsync(resourceGroupName, workflowName).map(new Func1<ServiceResponse<Object>, Object>() {
              @Override
              public Object call(ServiceResponse<Object> response) {
                  return response.body();
              }
          });
      }
docs: Gets an OpenAPI definition for the workflow.
  
  @param resourceGroupName The resource group name.
  @param workflowName The workflow name.
  @throws IllegalArgumentException thrown if parameters fail the validation
  @return the observable to the Object object