public static final String MIN_ELEMENT = "a";
    public static final String AFTER_LAST = "z";
    public static final String AFTER_LAST_2 = "zz";
  }

  public static class Chars extends SampleElements<Character> {
    public Chars() {
      // elements aren't sorted, to better test SortedSet iteration ordering
      super('b', 'a', 'c', 'd', 'e');
    }
  }

  public static class Enums extends SampleElements<AnEnum> {

    Set<Character> positive = Sets.newHashSetWithExpectedSize(chars.length);
    for (char c : chars) {
      positive.add(c);
    }
    for (int c = 0; c <= Character.MAX_VALUE; c++) {
      assertFalse(positive.contains(Character.valueOf((char) c)) ^ m.matches((char) c));
    }
  }

  static char[] randomChars(Random rand, int size) {
    Set<Character> chars = new HashSet<>(size);

   *     Stream.of("banana", "apple", "carrot", "asparagus", "cherry")
   *         .collect(
   *             flatteningToImmutableSetMultimap(
   *                  str -> str.charAt(0),
   *                  str -> str.substring(1).chars().mapToObj(c -> (char) c));
   *
   * // is equivalent to
   *
   * static final ImmutableSetMultimap<Character, Character> FIRST_LETTER_MULTIMAP =

        when(cifsContext.getConfig()).thenReturn(configuration);
        when(configuration.getOemEncoding()).thenReturn("Cp850");
        String password14 = "ABCDEFGHIJKLMN"; // 14 chars
        String password15 = "ABCDEFGHIJKLMNO"; // 15 chars, same first 14
        byte[] challenge = hex("0102030405060708");

        // Act
        byte[] r14 = NtlmUtil.getPreNTLMResponse(cifsContext, password14, challenge);

          private final char[] unknown = new char[] {'?'};

          @Override
          protected char[] escapeUnsafe(char c) {
            return unknown;
          }
        };
    EscaperAsserts.assertBasic(replacingEscaper);

    // Replacements are applied first regardless of whether the character is in
    // the safe range or not ('&' is a safe char while '\t' and '\n' are not).

        if (value == null || value.length() == 0) {
            replacement = '\u30fc';
        } else {
            replacement = value.charAt(0);
        }
    }

    @Override
    public Reader create(final Reader tokenStream) {
        return new ProlongedSoundMarkCharFilter(tokenStream, replacement);
    }

     */
    protected static String toPlainPattern(final String pattern) {
        final StringBuilder buf = new StringBuilder(pattern.length());
        for (int i = 0; i < pattern.length(); ++i) {
            final char ch = pattern.charAt(i);
            if (Character.isLetterOrDigit(ch) || Character.isWhitespace(ch)) {
                buf.append(ch);
            }
        }
        if (buf.indexOf("yy") == -1) {

    if (stringValue.length() == 0) {
      throw new NumberFormatException("empty string");
    }

    // Handle radix specifier if present
    String rawValue;
    int radix;
    char firstChar = stringValue.charAt(0);
    if (stringValue.startsWith("0x") || stringValue.startsWith("0X")) {
      rawValue = stringValue.substring(2);
      radix = 16;
    } else if (firstChar == '#') {

    public static String escape(final String value) {
        if (value == null) {
            return null;
        }

        char c;
        final int len = value.length();
        final StringBuilder buf = new StringBuilder(len * 2);

        for (int i = 0; i < len; i++) {
            c = value.charAt(i);
            String escaped = switch (c) {
            case '\\', '"' -> "\\" + c;
            case '/' -> "\\/";

        final int strLen = str != null ? str.length() : 0;
        if (strLen > 0) {
            for (int i = 0; i < strLen; i++) {
                if (!Character.isWhitespace(str.charAt(i))) {
                    return;
                }
            }
        }
        throw new IllegalArgumentException(message);
    }