docs: public Observable<List<CustomPrebuiltModel>> listCustomPrebuiltModelsAsync(UUID appId, String versionId) {
          return listCustomPrebuiltModelsWithServiceResponseAsync(appId, versionId).map(new Func1<ServiceResponse<List<CustomPrebuiltModel>>, List<CustomPrebuiltModel>>() {
              @Override
              public List<CustomPrebuiltModel> call(ServiceResponse<List<CustomPrebuiltModel>> response) {
                  return response.body();
              }
          });
      }