return MoreObjects.toStringHelper(ServiceManager.class)
        .add("services", Collections2.filter(services, not(instanceOf(NoOpService.class))))
        .toString();
  }

  /**
   * An encapsulation of all the mutable state of the {@link ServiceManager} that needs to be
   * accessed by instances of {@link ServiceListener}.
   */
  private static final class ServiceManagerState {

        // Execute
        final SsoMessageException exception = new SsoMessageException(messageCode, message);

        // Verify that it's an instance of FessSystemException
        assertTrue(exception instanceof FessSystemException);
        assertTrue(exception instanceof RuntimeException);
    }

    @Test
    public void test_stackTracePresence() {
        // Setup
        final String message = "Test stack trace";

   */
  public static <N> Graph<N> transpose(Graph<N> graph) {
    if (!graph.isDirected()) {
      return graph; // the transpose of an undirected graph is an identical graph
    }

    if (graph instanceof TransposedGraph) {
      return ((TransposedGraph<N>) graph).graph;
    }

    return new TransposedGraph<>(graph);
  }

  /**

        response.jobLogId("log-id-xyz").status(Status.OK);
        final ApiResult result = response.result();
        assertNotNull(result);
        assertNotNull(result.response);
        assertTrue(result.response instanceof ApiStartJobResponse);
        final ApiStartJobResponse resultResponse = (ApiStartJobResponse) result.response;
        assertEquals("log-id-xyz", resultResponse.jobLogId);
        assertEquals(0, resultResponse.status);
    }

   * they are returned by the iterable's iterator.
   *
   * @since 12.0
   */
  public static <E> ArrayDeque<E> newArrayDeque(Iterable<? extends E> elements) {
    if (elements instanceof Collection) {
      return new ArrayDeque<>((Collection<? extends E>) elements);
    }
    ArrayDeque<E> deque = new ArrayDeque<>();
    Iterables.addAll(deque, elements);
    return deque;
  }

        CurlException exception = new CurlException(message);

        assertEquals(message, exception.getMessage());
        assertNull(exception.getCause());
        assertTrue(exception instanceof RuntimeException);
    }

    @Test
    public void testConstructorWithMessageAndCause() {
        String message = "Test error message";
        IOException cause = new IOException("IO error");

      public boolean contains(@Nullable Object o) {
        if (o instanceof Entry) {
          Entry<?, ?> entry = (Entry<?, ?>) o;
          return containsMapping(entry.getKey(), columnKey, entry.getValue());
        }
        return false;
      }

      @Override
      public boolean remove(@Nullable Object obj) {
        if (obj instanceof Entry) {
          Entry<?, ?> entry = (Entry<?, ?>) obj;

    }

    @Test
    public void test_extendsFromFessSystemException() {
        final LlmException exception = new LlmException("Test");
        assertTrue(exception instanceof FessSystemException);
        assertTrue(exception instanceof RuntimeException);
    }

    @Test
    public void test_throwAndCatch() {
        boolean caught = false;
        try {
            throw new LlmException("Test exception");

      @ParametricNullness T instance) {
    return new SupplierOfInstance<>(instance);
  }

  private static final class SupplierOfInstance<T extends @Nullable Object>
      implements Supplier<T>, Serializable {
    @ParametricNullness final T instance;

    SupplierOfInstance(@ParametricNullness T instance) {
      this.instance = instance;
    }

    @Override
    @ParametricNullness
    public T get() {

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