*/
    public UnicodeString(final boolean zterm) {
        this.zterm = zterm;
    }

    /**
     * Constructs a UnicodeString by wrapping an existing unicode_string.
     *
     * @param rus wrapped string
     * @param zterm whether the string should be zero terminated
     */
    public UnicodeString(final rpc.unicode_string rus, final boolean zterm) {
        this.length = rus.length;

      new ListenerCallQueue.Event<Listener>() {
        @Override
        public void call(Listener listener) {
          listener.stopped();
        }

        @Override
        public String toString() {
          return "stopped()";
        }
      };

  /**
   * A listener for the aggregate state changes of the services that are under management. Users

	errorCounts := make(map[error]int)
	for _, err := range errs {
		if IsErrIgnored(err, ignoredErrs...) {
			continue
		}
		// Errors due to context cancellation may be wrapped - group them by context.Canceled.
		if errors.Is(err, context.Canceled) {
			errorCounts[context.Canceled]++
			continue
		}
		errorCounts[err]++
	}

	maxCnt := 0

    public synchronized void stop() {
        if (thread != null) {
            thread.interrupt();
            thread = null;
            if (logger.isDebugEnabled()) {
                logger.debug("TimeoutManager stopped.");
            }
        }
    }

    /**
     * Interrupts the thread and waits for it to terminate.
     *
     * @param timeoutMillis
     *            The time to wait (in milliseconds)

    }

    public ModelSource getSource() {
        return source;
    }

    /**
     * Gets the model being wrapped.
     *
     * @return The model or {@code null} if not set.
     */
    public Model getModel() {
        return model;
    }

    /**
     * Sets the model being wrapped.
     *
     * @param model The model, may be {@code null}.
     */
    public void setModel(Model model) {

    public UnicodeString(final boolean zterm) {
        this.zterm = zterm;
    }

    /**
     * Constructs a UnicodeString by wrapping an existing unicode_string.
     *
     * @param rus
     *            wrapped string
     * @param zterm
     *            whether the string should be zero terminated
     */
    public UnicodeString(final rpc.unicode_string rus, final boolean zterm) {
        this.length = rus.length;

//	// the ETag computed over the content.
//	reader := etag.Wrap(encryptedContent, content)
func Wrap(wrapped, content io.Reader) io.Reader {
	if t, ok := content.(Tagger); ok {
		return wrapReader{
			Reader: wrapped,
			Tagger: t,
		}
	}
	return wrapReader{
		Reader: wrapped,
	}
}

// A Reader wraps an io.Reader and computes the
// MD5 checksum of the read content as ETag.
//

    public static class StopFlag {
        private boolean stopped = false;

        /**
         * Constructs a new StopFlag with stopped set to false.
         */
        public StopFlag() {
            // Default constructor
        }

        /**
         * Signal to stop the scroll operation.
         */
        public void stop() {
            stopped = true;
        }

        /**

   * this initiates service shutdown and returns immediately. If the service is {@linkplain
   * State#NEW new}, it is {@linkplain State#TERMINATED terminated} without having been started nor
   * stopped. If the service has already been stopped, this method returns immediately without
   * taking action.
   *
   * @return this
   * @since 15.0
   */
  @CanIgnoreReturnValue
  Service stopAsync();

  /**

            final int days = ComponentUtil.getFessConfig().getPurgeSearchLogDay();
            if (days >= 0) {
                searchLogService.deleteBefore(days);
            } else {
                resultBuf.append("Skipped to purge search logs.\n");
            }
        } catch (final Exception e) {
            logger.error("Failed to purge search logs.", e);
            resultBuf.append(e.getMessage()).append("\n");
        }