* Out-of-range indexes return false.
   */
  @VisibleForTesting
  static boolean validSurrogatePairAt(CharSequence string, int index) {
    return index >= 0
        && index <= (string.length() - 2)
        && Character.isHighSurrogate(string.charAt(index))
        && Character.isLowSurrogate(string.charAt(index + 1));
  }

  /**

        CYAN(6, "CYAN"),
        WHITE(7, "WHITE"),
        DEFAULT(9, "DEFAULT");

        private final int value;
        private final String name;

        Color(int index, String name) {
            this.value = index;
            this.name = name;
        }

        @Override
        public String toString() {
            return name;
        }

        public int value() {

    //                                                                      ==============
    /**
     * Show the index page.
     * @return The HTML response.
     */
    @Execute
    @Secured({ ROLE, ROLE + VIEW })
    public HtmlResponse index() {
        return asHtml(path_AdminDict_AdminDictJsp).renderWith(data -> {

        assertEquals("Incorrect function.", msgs[2]);
    }

    @Test
    @DisplayName("Messages: accessing invalid index throws ArrayIndexOutOfBoundsException")
    void messagesOutOfBoundsThrows() {
        // Arrange
        String[] msgs = DosError.DOS_ERROR_MESSAGES;

        // Act & Assert: negative index
        assertThrows(ArrayIndexOutOfBoundsException.class, () -> {
            @SuppressWarnings("unused")

  }

  @Override
  public ImmutableSortedSet<E> elementSet() {
    return forward.elementSet().descendingSet();
  }

  @Override
  Entry<E> getEntry(int index) {
    return forward.entrySet().asList().reverse().get(index);
  }

  @Override
  public ImmutableSortedMultiset<E> descendingMultiset() {
    return forward;
  }

  @Override

    }

    private
    fun findMismatches(originalChanges: List<AcceptedApiChange>, sortedChanges: List<AcceptedApiChange>): List<AcceptedApiChange> {
        return originalChanges.filterIndexed { index, acceptedApiChange -> sortedChanges[index] != acceptedApiChange }
    }

    private
    fun buildErrorMessage(formattedMismatches: Map<File, String>): String {
        val messages = formattedMismatches.map {

                  public int size() {
                    return elements.length;
                  }

                  @Override
                  public String get(int index) {
                    return elements[index];
                  }
                };
              }
            })
        .named("AbstractList")
        .withFeatures(

     * @param message The detail message of the problem, may be {@code null}.
     * @param line The one-based index of the line containing the problem or {@code -1} if unknown.
     * @param column The one-based index of the column containing the problem or {@code -1} if unknown.
     * @param cause The cause of the problem, may be {@code null}.
     */

        List<String> order = new ArrayList<>();
        for (String s : insertionOrder) {
          int index = order.indexOf(s);
          if (index == -1) {
            order.add(s);
          } else {
            order.add(index, s);
          }
        }
        return order;
      }
    };
  }

     */
    long lastAccess();

    /**
     * Gets the file size.
     *
     * @return the file size in bytes
     */
    long length();

    /**
     * Gets the file index.
     *
     * @return the file index inside the parent directory
     */
    int getFileIndex();