*
   * This method is safe to be called concurrently, but provides limited guarantees. If a transport
   * layer connection has been established (such as a HTTP/2 stream) that is terminated. Otherwise,
   * if a socket connection is being established, that is terminated.
   */
  override fun cancel() {
    if (canceled) return // Already canceled.

    canceled = true
    exchange?.cancel()
    for (plan in plansToCancel) {

        gen.init(param);

        final byte[] derived = new byte[16];
        gen.generateBytes(derived, 0, 16);
        return derived;
    }

    /**
     * @param string
     * @return null terminated ASCII bytes
     */
    private static byte[] toCBytes(final String string) {
        final byte[] data = new byte[string.length() + 1];

    public enum Severity {
        RECOVERABLE, // Can retry the operation
        TRANSIENT, // Temporary error, retry after delay
        PERMANENT, // Operation cannot succeed
        FATAL // Connection or session must be terminated
    }

    /**
     * Error categories
     */
    public enum Category {
        AUTHENTICATION, AUTHORIZATION, NETWORK, PROTOCOL, RESOURCE, CONFIGURATION, ENCRYPTION, TIMEOUT, IO, UNKNOWN
    }

                    }
                    return FileVisitResult.CONTINUE
                }

                override fun visitFileFailed(file: Path?, exc: IOException?) =
                    FileVisitResult.TERMINATE

                override fun postVisitDirectory(dir: Path?, exc: IOException?) =
                    FileVisitResult.CONTINUE

                private
                fun Path.isClassFilePath() =

   * For example, {@code Splitter.on(Pattern.compile("\r?\n")).split(entireFile)} splits a string
   * into lines whether it uses DOS-style or UNIX-style line terminators.
   *
   * @param separatorPattern the pattern that determines whether a subsequence is a separator. This
   *     pattern may not match the empty string.

No sería tan importante en este ejemplo específico porque es un archivo falso en memoria (con `io.BytesIO`), pero con un archivo real sí sería importante asegurarse de que el archivo se cierre al terminar de trabajar con él.

### Archivos y async { #files-and-async }

En la mayoría de los casos, los objetos tipo archivo no son compatibles con `async` y `await` por defecto.

У більшості випадків ви (і вам слід) матимете «termination proxy», який обробляє HTTPS для вас зверху; це залежатиме від того, як ви розгортаєте ваш застосунок: ваш провайдер може зробити це за вас, або вам може знадобитися налаштувати це самостійно.

/// tip | Порада

         * @return true if the thread is actively executing
         */
        public boolean isRunning() {
            return running;
        }

        /**
         * Waits for the crawling thread to terminate.
         * This method blocks until the thread completes its execution.
         * Interrupted exceptions are caught and logged at debug level.
         */
        public void awaitTermination() {
            try {

        if (sneaky == null) {
          return sample;
        } else {
          /* Someone beat us to it! Trying again...
           *
           * Technically this loop not guaranteed to terminate, so theoretically (extremely
           * unlikely) this thread might starve, but even then, there is always going to be another
           * thread doing progress here.
           */
        }
      }
    }

            }
            if (exitValue != 0) {
                final StringBuilder out = new StringBuilder();
                if (processTimeout) {
                    out.append("Process is terminated due to ").append(timeout).append(" second exceeded.\n");
                }
                out.append("Exit Code: ").append(exitValue).append("\nOutput:\n").append(it.getOutput());