notifyStopped();
    }
  }

  /*
   * A NoOp service that will delay the startup and shutdown notification for a configurable amount
   * of time.
   */
  private static class NoOpDelayedService extends NoOpService {
    private final long delay;

    NoOpDelayedService(long delay) {
      this.delay = delay;
    }

    @Override
    protected void doStart() {
      new Thread() {

  private final OkHttpClient client = new OkHttpClient();

  public void run() throws Exception {
    Request request = new Request.Builder()
        .url("http://httpbin.org/delay/1") // This URL is served with a 1 second delay.
        .build();

    // Copy to customize OkHttp for this request.
    OkHttpClient client1 = client.newBuilder()
        .readTimeout(500, TimeUnit.MILLISECONDS)
        .build();

<img src="/img/tutorial/response-model/image02.png">

## Outras anotações de tipo de retorno

Pode haver casos em que você retorna algo que não é um campo Pydantic válido e anota na função, apenas para obter o suporte fornecido pelas ferramentas (o editor, mypy, etc).

### Retornar uma resposta diretamente

e=n.default('<div class="toast" role="alert" aria-live="assertive" aria-atomic="true"/>');e.data("autohide",this._config.autohide),e.data("animation",this._config.fade),this._config.class&&e.addClass(this._config.class),this._config.delay&&500!=this._config.delay&&e.data("delay",this._config.delay);var t=n.default('<div class="toast-header">');if(null!=this._config.image){var a=n.default("<img />").addClass("rounded mr-2").attr("src",this._config.image).attr("alt",this._config.imageAlt);null!=this._config.image...

   */
  @Override
  protected void expectContents(Collection<E> expectedCollection) {
    List<E> expectedList = copyToList(expectedCollection);
    // Avoid expectEquals() here to delay reason manufacture until necessary.
    if (getList().size() != expectedList.size()) {
      fail("size mismatch: " + reportContext(expectedList));
    }
    for (int i = 0; i < expectedList.size(); i++) {

                            }
                        });
                        dataValue = {};
                        if (isBlankSpace) {
                            dataValue["delay"] = 0;
                        }
                        if (buffer[buffer.length - 1] === "") {
                            // A last single <br> won't have effect
                            // so put an additional one

      private val client = OkHttpClient()

      fun run() {
        val request = Request.Builder()
            .url("http://httpbin.org/delay/2") // This URL is served with a 2 second delay.
            .build()

        val startNanos = System.nanoTime()
        val call = client.newCall(request)

        // Schedule a job to cancel the call in 1 second.

            Thread.sleep(5); // Small delay to ensure different timestamps
            Smb2LeaseKey key2 = limitedManager.requestLease("/share/file2.txt", Smb2LeaseState.SMB2_LEASE_READ_CACHING);
            Thread.sleep(5); // Small delay to ensure different timestamps

    server.useHttps(handshakeCertificates.sslSocketFactory())
  }

  private inner class DelayedRequestBody(
    private val delegate: RequestBody,
    delay: Long,
    timeUnit: TimeUnit,
  ) : RequestBody() {
    private val delayMillis = timeUnit.toMillis(delay)

    override fun contentType() = delegate.contentType()

    override fun isDuplex() = true

    override fun writeTo(sink: BufferedSink) {

Pode ser útil para retornar cabeçalhos e cookies personalizados, por exemplo.

## Retornando uma `Response`

Na verdade, você pode retornar qualquer `Response` ou subclasse dela.

/// tip | Dica

A própria `JSONResponse` é uma subclasse de `Response`.

///

E quando você retorna uma `Response`, o **FastAPI** vai repassá-la diretamente.