@Override
            public ApiFuture<ListWorkstationConfigsPagedResponse> getFuturePagedResponse(
                UnaryCallable<ListWorkstationConfigsRequest, ListWorkstationConfigsResponse>
                    callable,
                ListWorkstationConfigsRequest request,
                ApiCallContext context,
                ApiFuture<ListWorkstationConfigsResponse> futureResponse) {
              PageContext<
                      ListWorkstationConfigsRequest,
                      ListWorkstationConfigsResponse,
                      WorkstationConfig>
                  pageContext =
                      PageContext.create(
                          callable, LIST_WORKSTATION_CONFIGS_PAGE_STR_DESC, request, context);
              return ListWorkstationConfigsPagedResponse.createAsync(pageContext, futureResponse);
            }
The default scopes of the service.
java-workstations/google-cloud-workstations/src/main/java/com/google/cloud/workstations/v1beta/stub/WorkstationsStubSettings.java