@Override
            public ApiFuture<ListSubscriptionsPagedResponse> getFuturePagedResponse(
                UnaryCallable<ListSubscriptionsRequest, ListSubscriptionsResponse> callable,
                ListSubscriptionsRequest request,
                ApiCallContext context,
                ApiFuture<ListSubscriptionsResponse> futureResponse) {
              PageContext<ListSubscriptionsRequest, ListSubscriptionsResponse, Subscription>
                  pageContext =
                      PageContext.create(
                          callable, LIST_SUBSCRIPTIONS_PAGE_STR_DESC, request, context);
              return ListSubscriptionsPagedResponse.createAsync(pageContext, futureResponse);
            }
The default scopes of the service.
java-workspaceevents/google-cloud-workspaceevents/src/main/java/com/google/apps/events/subscriptions/v1/stub/SubscriptionsServiceStubSettings.java