Y las herramientas también estarán felices porque tanto `RedirectResponse` como `JSONResponse` son subclases de `Response`, por lo que la anotación del tipo es correcta.

### Anotar una Subclase de Response

También puedes usar una subclase de `Response` en la anotación del tipo:

{* ../../docs_src/response_model/tutorial003_03.py hl[8:9] *}

     * outgoing HTTP requests.
     *
     * If unset, [no cookies][CookieJar.NO_COOKIES] will be accepted nor provided.
     */
    fun cookieJar(cookieJar: CookieJar) =
      apply {
        this.cookieJar = cookieJar
      }

    /** Sets the response cache to be used to read and write cached responses. */
    fun cache(cache: Cache?) =

  private fun writeHttpResponse(
    socket: MockWebServerSocket,
    response: MockResponse,
  ) {
    socket.sleepWhileOpen(response.headersDelayNanos)
    socket.sink.writeUtf8(response.status)
    socket.sink.writeUtf8("\r\n")

    writeHeaders(socket.sink, response.headers)

    if (response.socketHandler != null) {
      response.socketHandler.handle(socket)
      return
    }

    end
```

/// info

Es wird nur **eine Response** an den Client gesendet. Es kann eine Error-Response oder die Response der *Pfadoperation* sein.

Nachdem eine dieser Responses gesendet wurde, kann keine weitere Response gesendet werden.

///

/// tip | Tipp

    "info": {
        "title": "FastAPI",
        "version": "0.1.0"
    },
    "paths": {
        "/items/": {
            "get": {
                "responses": {
                    "200": {
                        "description": "Successful Response",
                        "content": {
                            "application/json": {



...
```

#### Для чого потрібний OpenAPI

## 0.29.0

* Add support for declaring a `Response` parameter:
    * This allows declaring:
        * [Response Cookies](https://fastapi.tiangolo.com/advanced/response-cookies/).
        * [Response Headers](https://fastapi.tiangolo.com/advanced/response-headers/).
        * An HTTP Status Code different than the default: [Response - Change Status Code](https://fastapi.tiangolo.com/advanced/response-change-status-code/).

* Hỗ trợ **WebSocket**.
* In-process background tasks.
* Startup and shutdown events.
* Client cho kiểm thử xây dựng trên HTTPX.
* **CORS**, GZip, Static Files, Streaming responses.
* Hỗ trợ **Session and Cookie**.
* 100% test coverage.
* 100% type annotated codebase.

## Tính năng của Pydantic

* **WebSocket**-Unterstützung.
* Hintergrundaufgaben im selben Prozess.
* Ereignisse beim Starten und Herunterfahren.
* Testclient baut auf HTTPX auf.
* **CORS**, GZip, statische Dateien, Responses streamen.
* **Sitzungs- und Cookie**-Unterstützung.
* 100 % Testabdeckung.
* 100 % Typen annotierte Codebasis.

## Pydantic's Merkmale

* **WebSocket** support.
* In-process background tasks.
* Startup and shutdown events.
* Test client built on HTTPX.
* **CORS**, GZip, Static Files, Streaming responses.
* **Session and Cookie** support.
* 100% test coverage.
* 100% type annotated codebase.

## Pydantic features { #pydantic-features }

/**
 * This class represents the base response structure for API results.
 * It encapsulates the API response and provides methods to build different types of API responses.
 */
public class ApiResult {

    /**
     * The API response object.
     */
    protected ApiResponse response = null;

    /**
     * Constructs an ApiResult with the specified ApiResponse.
     * @param response The API response object.
     */