*
   * @throws IllegalArgumentException if the stream consists of two or more elements.
   * @throws NullPointerException if any element in the stream is {@code null}.
   * @return {@code Optional.of(onlyElement)} if the stream has exactly one element (must not be
   *     {@code null}) and returns {@code Optional.empty()} if it has none.
   */
  @SuppressWarnings("unchecked")
  public static <T> Collector<T, ?, Optional<T>> toOptional() {

                }));
    expectReplacement(entry(getKeyForNullValue(), v3()));
  }

  @MapFeature.Require({SUPPORTS_PUT, ALLOWS_NULL_KEYS})
  public void testMergeAbsentNullKey() {
    assertEquals(
        "Map.merge(null, value, function) should return value",
        v3(),
        getMap()
            .merge(
                null,
                v3(),

        assertEquals("abcd", normalizer.normalize("ａｂｃｄ", null));
        assertEquals("みかん", normalizer.normalize("みかん", null));
        assertEquals("みかん ﾘﾝｺﾞ", normalizer.normalize("みかん　リンゴ", null));
    }

    public void test_AnyLower() {
        ICUNormalizer normalizer = new ICUNormalizer("Any-Lower");
        assertEquals("abcd", normalizer.normalize("ABCD", null));
    }

    public void test_HalfwidthFullwidth() {

     *
     * @return The global toolchains source or {@code null} if none.
     */
    Source getGlobalToolchainsSource();

    /**
     * Sets the global toolchains source. If both user toolchains and a global toolchains are given, the user toolchains
     * take precedence.
     *
     * @param globalToolchainsSource The global toolchains source, may be {@code null} to disable global toolchains.

      newDelegate.add(element(i));
    }
    this.table = newDelegate;
    this.entries = null;
    this.elements = null;
    incrementModCount();
    return newDelegate;
  }

  @VisibleForTesting
  boolean isUsingHashFloodingResistance() {
    return delegateOrNull() != null;
  }

  /** Stores the hash table mask as the number of bits needed to represent an index. */

        Address dc;
        String msg, pathInfo, server = null;
        boolean offerBasic, possibleWorkgroup = true;
        NtlmPasswordAuthentication ntlm = null;
        HttpSession ssn = req.getSession(false);

        if ( ( pathInfo = req.getPathInfo() ) != null ) {
            int i;
            server = parseServerAndShare(pathInfo);
            if ( server != null && ( i = server.indexOf('/') ) > 0 ) {

    private static final String DEFAULT_SERVICE = "cifs";

    private static final Set<ASN1ObjectIdentifier> PREFERRED_MECHS = new HashSet<>();

    private Subject subject = null;
    private String user = null;
    private String realm = null;
    private String service = DEFAULT_SERVICE;
    private int userLifetime = GSSCredential.DEFAULT_LIFETIME;
    private int contextLifetime = GSSContext.DEFAULT_LIFETIME;

            throw new CurlException("Failed to access the content.", e);
        }
    }

    public InputStream getContentAsStream() throws IOException {
        if (contentCache == null) {
            if (contentException != null) {
                throw new CurlException("The content does not exist.", contentException);
            } else {
                throw new CurlException("The content does not exist.");
            }

        UserInfoCQ cq = new UserInfoCQ();
        if (queryLambda != null) {
            queryLambda.callback(cq);
        }
        FilterAggregationBuilder builder = regFilterA(name, cq.getQuery());
        if (opLambda != null) {
            opLambda.callback(builder);
        }
        if (aggsLambda != null) {
            UserInfoCA ca = new UserInfoCA();
            aggsLambda.callback(ca);

            false, "Long", 0, 0, null, null, false, null, null, null, null, null, false);
    protected final ColumnInfo _columnName = cci("name", "name", null, null, String.class, "name", null, false, false, false, "keyword", 0,
            0, null, null, false, null, null, null, null, null, false);

    public ColumnInfo columnGidNumber() {
        return _columnGidNumber;
    }

    public ColumnInfo columnName() {