* be a SynchronousQueue.
   */
  private ExecutorService threadPool;

  @Override
  public void setUp() {
    threadPool = newCachedThreadPool();
  }

  @Override
  public void tearDown() throws InterruptedException {
    threadPool.shutdown();
    assertTrue("Some worker didn't finish in time", threadPool.awaitTermination(10, SECONDS));
  }

  private static <T> int drain(

    }

    public SuggesterBuilder analyzer(final SuggestAnalyzer analyzer) {
        this.analyzer = analyzer;
        return this;
    }

    public SuggesterBuilder threadPool(final ExecutorService threadPool) {
        this.threadPool = threadPool;
        return this;
    }

    public SuggesterBuilder threadPoolSize(final int threadPoolSize) {
        this.threadPoolSize = threadPoolSize;
        return this;
    }

        To be awaitable, compatible with async, this is run in threadpool.
        """
        return await super().seek(offset)

    async def close(self) -> None:
        """
        Close the file.

        To be awaitable, compatible with async, this is run in threadpool.
        """
        return await super().close()

    @classmethod

    final String key = "key";

    final AtomicLongMap<String> map = AtomicLongMap.create();

    ExecutorService threadPool = Executors.newFixedThreadPool(nThreads);
    ArrayList<Future<Long>> futures = new ArrayList<>();
    for (int i = 0; i < nTasks; i++) {
      futures.add(
          threadPool.submit(
              new Callable<Long>() {
                @Override
                public Long call() {

    protected final String index;

    protected final ExecutorService threadPool;

    public Suggester(final Client client, final SuggestSettings settings, final ReadingConverter readingConverter,
            final ReadingConverter contentsReadingConverter, final Normalizer normalizer, final SuggestAnalyzer analyzer,
            final ExecutorService threadPool) {
        this.client = client;
        suggestSettings = settings;

    ExecutorService threadPool = Executors.newFixedThreadPool(nThreads);
    final CountDownLatch tasksFinished = new CountDownLatch(nTasks);
    for (int i = 0; i < nTasks; i++) {
      final String s = "a" + i;
      @SuppressWarnings("unused") // https://errorprone.info/bugpattern/FutureReturnValueIgnored
      Future<?> possiblyIgnoredError =
          threadPool.submit(
              new Runnable() {

    protected SuggestWriter suggestWriter;

    protected ExecutorService threadPool;

    public SuggestIndexer(final Client client, final String index, final ReadingConverter readingConverter,
            final ReadingConverter contentsReadingConverter, final Normalizer normalizer, final SuggestAnalyzer analyzer,
            final SuggestSettings settings, final ExecutorService threadPool) {
        this.client = client;
        this.index = index;

            }
            logger.info("Disconnected to {}", address);
        }
        connected = false;
    }

    @Override
    public ThreadPool threadPool() {
        return client.threadPool();
    }

    @Override
    public AdminClient admin() {
        return client.admin();
    }

    @Override

  // TODO(b/113217601): This is needed for EagerContext::runner_ to use a
  // threadpool, so that we avoid the possibility of running the runner_ in the
  // threadpool of GPU event mgr, as that can trigger more callbacks to be
  // scheduled on that same threadpool, causing a deadlock in cases where the
  // caller of event_mgr->ThenExecute() blocks on the completion of the callback

///

### Path operation functions

Cuando declaras una *path operation function* con `def` normal en lugar de `async def`, se ejecuta en un threadpool externo que luego es "<abbr title="En español: esperado. Usando await.">awaited</abbr>", en lugar de ser llamado directamente (ya que bloquearía el servidor).