*/
  private static <N> boolean subgraphHasCycle(
      Graph<N> graph, Map<Object, NodeVisitState> visitedNodes, N startNode) {
    Deque<NodeAndRemainingSuccessors<N>> stack = new ArrayDeque<>();
    stack.addLast(new NodeAndRemainingSuccessors<>(startNode));

    while (!stack.isEmpty()) {
      // To peek at the top two items, we need to temporarily remove one.

                }
            }
        };
        Optional<Activation> root = Optional.of(activation);
        stk.push(new ActivationFrame("activation", root));
        root.map(Activation::getFile).ifPresent(fa -> {
            stk.push(new ActivationFrame("file", Optional.of(fa)));
            stk.push(new ActivationFrame("exists", Optional.empty()));
            validator.accept(fa.getExists());
            stk.peek().location = "missing";

    /**
     * Constructs a new {@link SuggestBulkFileWriter}.
     */
    public SuggestBulkFileWriter() {
        // nothing
    }

    @Override
    public SuggestWriterResult write(final Client client, final SuggestSettings settings, final String index, final SuggestItem[] items,
            final boolean update) {
        throw new UnsupportedOperationException("not yet.");
    }

    @Override

            // When - simulate concurrent requests
            Thread thread1 = new Thread(() -> transportPool.getSmbTransport(context, address, DEFAULT_PORT, false));
            Thread thread2 = new Thread(() -> transportPool.getSmbTransport(context, address, DEFAULT_PORT, true));

            thread1.start();
            thread2.start();

            Thread[] threads = new Thread[numThreads];
            final AtomicInteger successfulThreads = new AtomicInteger(0);
            final AtomicInteger blockedAttempts = new AtomicInteger(0);
            final AtomicInteger exceptionCount = new AtomicInteger(0);

            for (int i = 0; i < numThreads; i++) {
                final int threadId = i;
                threads[i] = new Thread(() -> {
                    try {

  @AndroidIncompatible // test-suite builders
  public static Test suite() {
    TestSuite suite = new TestSuite();
    suite.addTestSuite(ImmutableClassToInstanceMapTest.class);

    suite.addTest(
        MapTestSuiteBuilder.using(
                new TestClassToInstanceMapGenerator() {
                  // Other tests will verify what real, warning-free usage looks like

        if (context == null) {
            return;
        }
        if (this.createContexts == null) {
            this.createContexts = new CreateContextRequest[] { context };
        } else {
            CreateContextRequest[] newContexts = new CreateContextRequest[this.createContexts.length + 1];
            System.arraycopy(this.createContexts, 0, newContexts, 0, this.createContexts.length);

        return asJson(new ApiConfigResponse().setting(labelTypeService.getLabelType(id).map(this::createEditBody).orElseGet(() -> {
            throwValidationErrorApi(messages -> messages.addErrorsCrudCouldNotFindCrudTable(GLOBAL, id));
            return null;
        })).status(Status.OK).result());
    }

    /**
     * Creates a new label type setting.
     *

        List<Integer> pageNumberList = new ArrayList<Integer>(1);
        relatedQueryPager.setPageNumberList(pageNumberList);
        assertEquals(pageNumberList, relatedQueryPager.getPageNumberList());

    }

    public void test_clear() {
        RelatedQueryPager relatedQueryPager = new RelatedQueryPager();
        relatedQueryPager.id = "testId";

        assertEquals(999, schedulerPager.getCurrentPageNumber());
        List<Integer> pageNumberList = new ArrayList<Integer>(1);
        schedulerPager.setPageNumberList(pageNumberList);
        assertEquals(pageNumberList, schedulerPager.getPageNumberList());

    }

    public void test_clear() {
        SchedulerPager schedulerPager = new SchedulerPager();
        schedulerPager.id = "testId";
        schedulerPager.name = "testName";