if (entryDn == null) {
            return null;
        }
        int start = entryDn.toLowerCase(Locale.ROOT).indexOf("cn=");
        if (start == -1) {
            return null;
        }
        start += 3;

        final int end = entryDn.indexOf(',', start);
        final String value = end == -1 ? entryDn.substring(start) : entryDn.substring(start, end);

    }

    @Override
    public int indexIn(CharSequence sequence) {
      return (sequence.length() == 0) ? -1 : 0;
    }

    @Override
    public int indexIn(CharSequence sequence, int start) {
      int length = sequence.length();
      checkPositionIndex(start, length);
      return (start == length) ? -1 : start;
    }

    @Override
    public int lastIndexIn(CharSequence sequence) {

    assertTrue(enumer.hasMoreElements());
    assertEquals(1, (int) enumer.nextElement());
    assertTrue(enumer.hasMoreElements());
    assertEquals(2, (int) enumer.nextElement());
    assertTrue(enumer.hasMoreElements());
    assertEquals(3, (int) enumer.nextElement());
    assertFalse(enumer.hasMoreElements());
  }

  private static Enumeration<Integer> enumerate(int... ints) {

  }

  private static Object objectWithHashCode(final int hashCode) {
    return new Object() {
      @Override
      public int hashCode() {
        return hashCode;
      }
    };
  }

  // TODO b/327389044 - `Set<? extends Object> elements` should be enough but J2KT needs the <E>
  private static <E> void assertPowerSetHashCode(int expected, Set<E> elements) {

  E copyEntry(E original, E newNext) {
    int hash = original.getHash();
    return segmentFor(hash).copyEntry(original, newNext);
  }

  int hash(Object key) {
    int h = keyEquivalence.hash(key);
    return rehash(h);
  }

  void reclaimValue(WeakValueReference<K, V, E> valueReference) {
    E entry = valueReference.getEntry();
    int hash = entry.getHash();

   */
  public static void checkPositionIndexes(int start, int end, int size) {
    // Carefully optimized for execution by hotspot (explanatory comment above)
    if (start < 0 || end < start || end > size) {
      throw new IndexOutOfBoundsException(badPositionIndexes(start, end, size));
    }
  }

  private static String badPositionIndexes(int start, int end, int size) {
    if (start < 0 || start > size) {

     * @param out
     *            出力ストリーム
     * @return コピーしたバイト数
     */
    protected static int copyInternal(final InputStream in, final OutputStream out) {
        try {
            final byte[] buf = new byte[DEFAULT_BUF_SIZE];
            int len;
            int amount = 0;
            while ((len = in.read(buf)) != -1) {
                out.write(buf, 0, len);
                amount += len;

        TypeToken.of(StringListIterable[].class).getSupertype(Iterable[].class));
    assertEquals(int[].class, TypeToken.of(int[].class).getSupertype(int[].class).getType());
    assertEquals(Object.class, TypeToken.of(int[].class).getSupertype(Object.class).getType());
    assertEquals(int[][].class, TypeToken.of(int[][].class).getSupertype(int[][].class).getType());
    assertEquals(

    default int availableProcessors() {
        final int num = getProcessorsAsInteger();
        if (num > 0) {
            return num;
        }
        return Runtime.getRuntime().availableProcessors();
    }

    Integer getCrawlerHttpThreadPoolSizeAsInteger();

    default int getCrawlerHttpProcessors() {
        final int num = getCrawlerHttpThreadPoolSizeAsInteger();

      }
      return false;
    }

    @Override
    public int hashCode() {
      // Warning: this is broken if size() == 0, so it is critical that we
      // substitute an empty ImmutableSet to the user in place of this

      // It's a weird formula, but tests prove it works.
      int adjust = size() - 1;
      for (int i = 0; i < axes.size(); i++) {
        adjust *= 31;
        adjust = ~~adjust;