docs: public Observable<Page<CognitiveServicesAccountInner>> listAsync() {
          return listWithServiceResponseAsync().map(new Func1<ServiceResponse<List<CognitiveServicesAccountInner>>, Page<CognitiveServicesAccountInner>>() {
              @Override
              public Page<CognitiveServicesAccountInner> call(ServiceResponse<List<CognitiveServicesAccountInner>> response) {
                  PageImpl<CognitiveServicesAccountInner> page = new PageImpl<>();
                  page.setItems(response.body());
                  return page;
              }
          });
      }