*       Objects.equal}{@code (a, b)} implies that {@code Objects.equal(function.apply(a),
   *       function.apply(b))}.
   * </ul>
   *
   * @throws NullPointerException if {@code input} is null and this function does not accept null
   *     arguments
   */
  @ParametricNullness
  T apply(@ParametricNullness F input);

  /**

        final Lifecycle lifecycle = getLifeCycleById("wrapper");
        assertThat(lifecycle.getId(), is("wrapper"));
        assertThat(lifecycle.getPhases(), hasSize(1));
    }

    @Test
    void testCustomLifecycle() throws ComponentLookupException {
        List<Lifecycle> myLifecycles = new ArrayList<>();
        Lifecycle myLifecycle =
                new Lifecycle("etl", Arrays.asList("extract", "transform", "load"), Collections.emptyMap());

    def javaHome = new File("tmp")
    def connectTimeoutSecs = 1
    def daemonCounter = 0

    class OutgoingConnectorStub implements OutgoingConnector {
        ConnectCompletion connect(Address address) throws ConnectException {
            def connection = [:] as RemoteConnection
            // unsure why I can't add this as property in the map-mock above
            connection.metaClass.num = address.num

    @RequiredFeature(feature = GradleMetadataResolveRunner.GRADLE_METADATA, value = "true")
    def "reasonable error message when a user rule throws an exception (#rule)"() {
        given:
        repository {
            'org:testA:1.0' {
                variant('runtime') {
                    capability('org', 'testA', '1.0')
                    capability('cap')

        } else {
            if (!lockOptions.equals(dirCacheReference.lockOptions)) {
                throw new IllegalStateException(String.format("Cache '%s' is already open with different lock options.", cacheDir));
            }
            if (!properties.equals(dirCacheReference.properties)) {
                throw new IllegalStateException(String.format("Cache '%s' is already open with different properties.", cacheDir));
            }

            ImmutableMultimap.of(1, "a", 2, "b"), ImmutableMultimap.of(2, "b", 1, "a"))
        .testEquals();
  }

  @J2ktIncompatible
  @GwtIncompatible // reflection
  public void testNulls() throws Exception {
    NullPointerTester tester = new NullPointerTester();
    tester.testAllPublicStaticMethods(ImmutableMultimap.class);
    tester.ignore(ImmutableListMultimap.class.getMethod("get", Object.class));

        final File homeDir;
        boolean closed

        SomeHomeDirService(File homeDir) {
            this.homeDir = homeDir
        }

        @Override
        void close() throws IOException {
            closed = true
        }
    }

    class HomeDirServiceProvider implements ServiceRegistrationProvider {
        @Provides

  }

  @J2ktIncompatible
  private void writeObject(ObjectOutputStream stream) throws IOException {
    stream.defaultWriteObject();
    stream.writeInt(size());
    for (E e : this) {
      stream.writeObject(e);
    }
  }

  @SuppressWarnings("unchecked")
  @J2ktIncompatible
  private void readObject(ObjectInputStream stream) throws IOException, ClassNotFoundException {
    stream.defaultReadObject();

    public TestNGOptions getOptions() {
        return options;
    }

    @Override
    public TestNGDetector getDetector() {
        return detector;
    }

    @Override
    public void close() throws IOException {
        // Clear expensive state from the test framework to avoid holding on to memory
        // This should probably be a part of the test task and managed there.
        detector = null;
    }

                                void writeExternal(ObjectOutput out) {
                                    throw new IOException("can't be serialized")
                                }

                                void readExternal(ObjectInput input) throws IOException, ClassNotFoundException {
                                    throw new IOException("can't be serialized")
                                }
                            }