Supplier<Integer> supplier = new CountingSupplier();
    Function<@Nullable Object, Integer> function = Functions.forSupplier(supplier);

    assertEquals(1, (int) function.apply(null));
    assertEquals(2, (int) function.apply("foo"));

    new EqualsTester()
        .addEqualityGroup(function, Functions.forSupplier(supplier))
        .addEqualityGroup(Functions.forSupplier(new CountingSupplier()))

    protected Analyzer analyzer = new WhitespaceAnalyzer();

    /** Whether to allow leading wildcards in query terms */
    protected boolean allowLeadingWildcard = true;

    /** The default operator to use between query terms */
    protected Operator defaultOperator = Operator.AND;

    /** List of filters to apply to queries */
    protected List<Filter> filterList = new ArrayList<>();

    private static final Object[] OBJECT_ARGS = new Object[0];

    /**
     * Use a WeakHashMap here, so the keys (Class objects) can be garbage collected.
     * This approach prevents permgen space overflows due to retention of discarded
     * classloaders.
     */
    private static final Map<Class<?>, WeakReference<ClassMap>> CLASS_MAPS = new WeakHashMap<>();

    static final int EOF = -1;

      Throwable cause, Class<X> exceptionClass) throws X {
    if (cause instanceof Error) {
      throw new ExecutionError((Error) cause);
    }
    if (cause instanceof RuntimeException) {
      throw new UncheckedExecutionException(cause);
    }
    throw newWithCause(exceptionClass, cause);
  }

  /*

                .build();
    }

    /**
     * Creates a new builder for constructing a ProjectBuilderRequest.
     *
     * @return a new ProjectBuilderRequestBuilder
     */
    @Nonnull
    static ProjectBuilderRequestBuilder builder() {
        return new ProjectBuilderRequestBuilder();
    }

    /**
     * Builder for creating ProjectBuilderRequest instances.

        private Server server;

        public TestApiExtractorServer(final int port) {
            server = new Server(port);

            final RequestHandlerImpl request_handler = new RequestHandlerImpl();
            final HandlerList handlers = new HandlerList();
            handlers.setHandlers(new Handler[] { request_handler, new DefaultHandler() });
            server.setHandler(handlers);
        }

        public void start() {

        void testMultipleSequentialEncodings() {
            // Given
            SrvCopychunk chunk1 = new SrvCopychunk(100, 200, 300);
            SrvCopychunk chunk2 = new SrvCopychunk(400, 500, 600);
            SrvCopychunk chunk3 = new SrvCopychunk(700, 800, 900);
            byte[] buffer = new byte[EXPECTED_SIZE * 3];

            // When
            int offset1 = chunk1.encode(buffer, 0);

            // Read the new key that was just set
            assertEquals("new.value", wrapperProps.getProperty("new.key"));
        }

        @Test
        void testMultipleWrapperPropertiesShareSameBackend() {
            // Create a Model with initial properties
            Model model = new Model();

            Properties initialProps = new Properties();

        Map<String, ArtifactRepository> versionIndex = new HashMap<>();

        Metadata metadata = new DefaultMetadata(
                request.getArtifact().getGroupId(),
                request.getArtifact().getArtifactId(),
                MAVEN_METADATA_XML,
                wantedNature);

        List<MetadataRequest> metadataRequests =
                new ArrayList<>(request.getRepositories().size());

        TransferListener delegate;
        if (quiet || noTransferProgress || quietCI) {
            delegate = new QuietMavenTransferListener();
        } else if (context.interactive && !logFile) {
            if (context.simplexTransferListener == null) {
                SimplexTransferListener simplex = new SimplexTransferListener(new ConsoleMavenTransferListener(
                        context.invokerRequest.messageBuilderFactory(),