@Override
            public ApiFuture<ListOrchestrationClustersPagedResponse> getFuturePagedResponse(
                UnaryCallable<ListOrchestrationClustersRequest, ListOrchestrationClustersResponse>
                    callable,
                ListOrchestrationClustersRequest request,
                ApiCallContext context,
                ApiFuture<ListOrchestrationClustersResponse> futureResponse) {
              PageContext<
                      ListOrchestrationClustersRequest,
                      ListOrchestrationClustersResponse,
                      OrchestrationCluster>
                  pageContext =
                      PageContext.create(
                          callable, LIST_ORCHESTRATION_CLUSTERS_PAGE_STR_DESC, request, context);
              return ListOrchestrationClustersPagedResponse.createAsync(
                  pageContext, futureResponse);
            }
The default scopes of the service.
java-telcoautomation/google-cloud-telcoautomation/src/main/java/com/google/cloud/telcoautomation/v1/stub/TelcoAutomationStubSettings.java