* the stack of the DFS, while {@code COMPLETE} means that the node and all its successors have
   * been already explored. Any node that has not been explored will not have a state at all.
   */
  private enum NodeVisitState {
    PENDING,
    COMPLETE
  }

   * the stack of the DFS, while {@code COMPLETE} means that the node and all its successors have
   * been already explored. Any node that has not been explored will not have a state at all.
   */
  private enum NodeVisitState {
    PENDING,
    COMPLETE
  }

     * all must complete within one timeout period.
     *
     * The default value is 0 which imposes no timeout.
     */
    fun callTimeout(
      timeout: Long,
      unit: TimeUnit,
    ) = apply {
      callTimeout = checkDuration("timeout", timeout, unit)
    }

    /**
     * Sets the default timeout for complete calls. A value of 0 means no timeout, otherwise values

     * setException() will be a no-op because the Future is already done.
     *
     * Both scenarios are bad: The output Future might never complete, or, if it does complete, it
     * might not run some of its listeners. The likely result is that the app will hang. (And of
     * course stack overflows are bad news in general. For example, we may have overflowed in the

        // Default constructor
    }

    /**
     * Initializes the file type mappings by loading configuration from Fess settings.
     * This method is called automatically after dependency injection is complete.
     * The mappings are loaded from the index filetype configuration property,
     * where each line contains a MIME type to file type mapping in the format "mimetype=filetype".
     */
    @PostConstruct

     * Initializes the helper with an empty related query map.
     */
    public RelatedQueryHelper() {
        super();
    }

    /**
     * Initializes the RelatedQueryHelper after dependency injection is complete.
     * This method is called automatically by the dependency injection framework
     * and loads the initial related query configurations.
     */
    @PostConstruct
    public void init() {

            override fun onSucceeded(
              request: UrlRequest,
              info: UrlResponseInfo,
            ) {
              println("onSucceeded ${info.headers.asMap}")
              completableFuture.complete(Response(info.httpStatusCode, info.negotiatedProtocol, buffer.readUtf8()))
            }

            override fun onFailed(
              request: UrlRequest,
              info: UrlResponseInfo?,

      @Override
      public void onEvent(@NotNull EventSource eventSource, @Nullable String id, @Nullable String type, @NotNull String data) {
        try {
          assertEquals("hello", data);
          future.complete(null);
        } catch (Exception e) {
          future.completeExceptionally(e);
        }
      }

      @Override
      public void onClosed(@NotNull EventSource eventSource) {

 *
 * <h3>Extension</h3>
 *
 * If you want a class like {@code FluentFuture} but with extra methods, we recommend declaring your
 * own subclass of {@link ListenableFuture}, complete with a method like {@link #from} to adapt an
 * existing {@code ListenableFuture}, implemented atop a {@link ForwardingListenableFuture} that
 * forwards to that future and adds the desired methods.
 */
@GwtCompatible

          .build(),
      )
    call.enqueue(
      object : Callback {
        override fun onFailure(
          call: Call,
          e: okio.IOException,
        ) {
          callFailure.complete(e)
        }

        override fun onResponse(
          call: Call,
          response: Response,
        ) {
        }
      },
    )