*/
    @Nonnull
    String asString();

    /**
     * Obtain a Stream containing this node and all its descendants.
     *
     * @return a stream containing this node and its descendants
     */
    @Nonnull
    default Stream<Node> stream() {
        return Stream.concat(Stream.of(this), getChildren().stream().flatMap(Node::stream));

     * Supports both GET and PUT requests for retrieving paginated file authentication configurations.
     *
     * @param body search parameters for filtering and pagination
     * @return JSON response containing file authentication settings list with pagination info
     */
    @Execute
    public JsonResponse<ApiResult> settings(final SearchBody body) {
        validateApi(body, messages -> {});

   */
  @SuppressWarnings("unchecked")
  public static <B> ImmutableClassToInstanceMap<B> of() {
    return (ImmutableClassToInstanceMap<B>) EMPTY;
  }

  /**
   * Returns an {@code ImmutableClassToInstanceMap} containing a single entry.
   *
   * @since 19.0
   */
  public static <B, T extends B> ImmutableClassToInstanceMap<B> of(Class<T> type, T value) {

  }

  /**
   * Returns statistics over a dataset containing the given values.
   *
   * @param values a series of values
   */
  public static Stats of(double... values) {
    StatsAccumulator accumulator = new StatsAccumulator();
    accumulator.addAll(values);
    return accumulator.snapshot();
  }

  /**
   * Returns statistics over a dataset containing the given values.
   *

        }).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(

     *
     * @param buf buffer containing data to send
     * @param off offset in the buffer
     * @param length length of data to send
     * @throws IOException if an I/O error occurs
     */
    void send(byte[] buf, int off, int length) throws IOException;

    /**
     * Performs a transaction on the pipe.
     *
     * @param buf the buffer containing the transaction data

            saveToken();
        });
    }

    /**
     * Handles user login with the provided credentials.
     *
     * @param form the login form containing username and password
     * @return the HTML response after login attempt
     */
    @Execute
    public HtmlResponse login(final LoginForm form) {
        validate(form, messages -> {}, () -> asIndexPage(form));