/**
     * Serves a thumbnail image for the specified document.
     *
     * @param form the thumbnail request form containing document ID and query parameters
     * @return ActionResponse containing the thumbnail image or 404 if not found
     */
    @Execute
    public ActionResponse index(final ThumbnailForm form) {

  /**
   * Returns a string containing the string representation of each of {@code parts}, using the
   * previously configured separator between each.
   *
   * @since 11.0
   */
  public final String join(Iterator<?> parts) {
    return appendTo(new StringBuilder(), parts).toString();
  }

  /**
   * Returns a string containing the string representation of each of {@code parts}, using the

     * @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}.
     */

    // GET /api/admin/storage/list/{id}
    // PUT /api/admin/storage/list/{id}
    /**
     * Lists files and directories in storage.
     * @param id The ID of the directory to list.
     * @return A JSON response containing the list of files and directories.
     */
    @Execute
    public JsonResponse<ApiResult> list(final OptionalThing<String> id) {

    // GET /api/admin/accesstoken
    // PUT /api/admin/accesstoken
    /**
     * Retrieves a list of access token settings.
     *
     * @param body the search body containing filter criteria
     * @return JSON response with access token list
     */
    @Execute
    public JsonResponse<ApiResult> settings(final SearchBody body) {
        validateApi(body, messages -> {});

        }).orElse(Collections.emptyList());
    }

    /**
     * Retrieves a stopwords file for a given dictionary ID.
     *
     * @param dictId The ID of the dictionary.
     * @return An optional entity containing the stopwords file, or empty if not found.
     */
    public OptionalEntity<StopwordsFile> getStopwordsFile(final String dictId) {
        return dictionaryManager.getDictionaryFile(dictId)

        }).orElse(Collections.emptyList());
    }

    /**
     * Retrieves a synonym file for a given dictionary ID.
     *
     * @param dictId The ID of the dictionary.
     * @return An optional entity containing the synonym file, or empty if not found.
     */
    public OptionalEntity<SynonymFile> getSynonymFile(final String dictId) {
        return dictionaryManager.getDictionaryFile(dictId)

    /**
     * Base-64 encodes the supplied block of data.  Line wrapping is not
     * applied on output.
     *
     * @param bytes The block of data that is to be Base-64 encoded.
     * @return A <code>String</code> containing the encoded data.
     */
    public static String encode(final byte[] bytes) {
        int length = bytes.length;
        if (length == 0) {
            return "";
        }

     * @param source A hint about the source of the problem like a file path, may be {@code null}.
     * @param lineNumber The one-based index of the line containing the problem or {@code -1} if unknown.
     * @param columnNumber The one-based index of the column containing the problem or {@code -1} if unknown.
     * @param exception The exception that caused this problem, may be {@code null}.
     */
    DefaultProblem(

  /**
   * Creates a {@code LinkedBlockingQueue} with a capacity of {@link Integer#MAX_VALUE}, containing
   * the elements of the specified iterable, in the order they are returned by the iterable's
   * iterator.
   *
   * @param elements the elements that the queue should contain, in order
   * @return a new {@code LinkedBlockingQueue} containing those elements
   */
  @J2ktIncompatible
  @GwtIncompatible // LinkedBlockingQueue