<img src="/img/tutorial/body/image03.png">

Você também poderá receber verificações de erros para operações de tipos incorretas:

<img src="/img/tutorial/body/image04.png">

Isso não é por acaso, todo o framework foi construído em volta deste design.

			// No rows were seen by MAX
			return FromNull(), nil
		}
		return e.aggregate.runningMax, nil

	case aggFnSum:
		// TODO: check if returning 0 when no rows were seen
		// by SUM is expected behavior.
		return e.aggregate.runningSum, nil

	default:
		// TODO:
	}

	return nil, errInvalidAggregation

   * PermittedMetaException}.
   */
  protected final class MultiExceptionListIterator implements ListIterator<E> {
    // TODO: track seen elements when order isn't guaranteed
    // TODO: verify contents afterward
    // TODO: something shiny and new instead of Stack
    // TODO: test whether null is supported (create a Feature)
    /**

* `.gitignore`: el nombre del archivo donde debería escribirse el texto

Y `*` para Git significa "todo". Así que, ignorará todo en el directorio `.venv`.

Ese comando creará un archivo `.gitignore` con el contenido:

```gitignore
*
```

///

## Instala Paquetes { #install-packages }

    }

    /**
     * Send a 429 Too Many Requests response.
     * @param response the HTTP response
     * @param retryAfterSeconds the Retry-After header value
     * @throws IOException if an I/O error occurs
     */
    protected void sendRateLimitResponse(final HttpServletResponse response, final int retryAfterSeconds) throws IOException {
        response.setStatus(429); // Too Many Requests

@SuppressWarnings("serial") // Serialization only done in GWT.
public abstract class ForwardingImmutableSet<E> extends ImmutableSet<E> {
  private final transient Set<E> delegate;

  ForwardingImmutableSet(Set<E> delegate) {
    // TODO(cpovirk): are we over-wrapping?
    this.delegate = Collections.unmodifiableSet(delegate);
  }

  @Override
  public UnmodifiableIterator<E> iterator() {
    return Iterators.unmodifiableIterator(delegate.iterator());

    private final Pattern regex = Pattern.compile("-v?\\d+.*");

    private final Logger logger = Logging.getLogger(getClass());

    private static final String SHA_EXTENSION = ".sha1";

    // TODO: we should be able to default this to eg compile deps, but we need to move the licenses
    // check from distribution to core (ie this should only be run on java projects)
    /**

    return when {
      type == TYPE_PUSH_PROMISE && flags and FLAG_END_PUSH_PROMISE != 0 -> {
        result.replace("HEADERS", "PUSH_PROMISE") // TODO: Avoid allocation.
      }

      type == TYPE_DATA && flags and FLAG_COMPRESSED != 0 -> {
        result.replace("PRIORITY", "COMPRESSED") // TODO: Avoid allocation.
      }

      else -> {
        result
      }
    }
  }

## 기본값 덮어쓰기 { #overriding-the-defaults }

위 정보를 바탕으로, 동일한 유틸리티 함수를 사용해 OpenAPI 스키마를 생성하고 필요한 각 부분을 덮어쓸 수 있습니다.

예를 들어, [커스텀 로고를 포함하기 위한 ReDoc의 OpenAPI 확장](https://github.com/Rebilly/ReDoc/blob/master/docs/redoc-vendor-extensions.md#x-logo)을 추가해 보겠습니다.

### 일반적인 **FastAPI** { #normal-fastapi }

먼저, 평소처럼 **FastAPI** 애플리케이션을 모두 작성합니다:

{* ../../docs_src/extending_openapi/tutorial001_py310.py hl[1,4,7:9] *}

    protected Map<String, Object> elementsAll; // lazy-loaded, then after not null
    protected Map<String, MultipartFormFile> elementsFile; // me too
    protected Map<String, String[]> elementsText; // me too

    // ===================================================================================
    //                                                                      Handle Request