@Override
            public ApiFuture<ListProductsPagedResponse> getFuturePagedResponse(
                UnaryCallable<ListProductsRequest, ListProductsResponse> callable,
                ListProductsRequest request,
                ApiCallContext context,
                ApiFuture<ListProductsResponse> futureResponse) {
              PageContext<ListProductsRequest, ListProductsResponse, Product> pageContext =
                  PageContext.create(callable, LIST_PRODUCTS_PAGE_STR_DESC, request, context);
              return ListProductsPagedResponse.createAsync(pageContext, futureResponse);
            }
The default scopes of the service.
java-vision/google-cloud-vision/src/main/java/com/google/cloud/vision/v1p3beta1/stub/ProductSearchStubSettings.java