docs: public Observable<WorkflowVersionInner> getAsync(String resourceGroupName, String workflowName, String versionId) {
          return getWithServiceResponseAsync(resourceGroupName, workflowName, versionId).map(new Func1<ServiceResponse<WorkflowVersionInner>, WorkflowVersionInner>() {
              @Override
              public WorkflowVersionInner call(ServiceResponse<WorkflowVersionInner> response) {
                  return response.body();
              }
          });
      }