docs: public Observable<Page<WorkflowVersionInner>> listAsync(final String resourceGroupName, final String workflowName, final Integer top) {
          return listWithServiceResponseAsync(resourceGroupName, workflowName, top)
              .map(new Func1<ServiceResponse<Page<WorkflowVersionInner>>, Page<WorkflowVersionInner>>() {
                  @Override
                  public Page<WorkflowVersionInner> call(ServiceResponse<Page<WorkflowVersionInner>> response) {
                      return response.body();
                  }
              });
      }