* event handler
* exception handler
* 처리하다

* model
* Pydantic model
* data model
* database model
* form model
* model object

* class
* base class
* parent class
* subclass
* child class
* sibling class
* class method

* header
* headers
* authorization header
* `Authorization` header
* forwarded header

* dependency injection system
* dependency

      }
      return processor.getResult();
    }

    @Override
    public String toString() {
      return "CharSource.wrap(" + Ascii.truncate(seq, 30, "...") + ")";
    }
  }

  /**
   * Subclass specialized for string instances.
   *
   * <p>Since Strings are immutable and built into the jdk we can optimize some operations
   *
   * <ul>

이 간단한 경우는 반환 타입 어노테이션이 `Response` 클래스(또는 그 서브클래스)이기 때문에 FastAPI에서 자동으로 처리됩니다.

그리고 `RedirectResponse`와 `JSONResponse`는 모두 `Response`의 서브클래스이므로, 타입 어노테이션이 올바르기 때문에 도구들도 만족합니다.

### Response 서브클래스 어노테이션 { #annotate-a-response-subclass }

타입 어노테이션에 `Response`의 서브클래스를 사용할 수도 있습니다:

{* ../../docs_src/response_model/tutorial003_03_py310.py hl[8:9] *}

이는 `RedirectResponse`가 `Response`의 서브클래스이기 때문에 동작하며, FastAPI가 이 간단한 경우를 자동으로 처리합니다.

import jcifs.smb.RequestParam;

/**
 * This class simplifies communication for protocols that support
 * multiplexing requests. It encapsulates a stream and some protocol
 * knowledge (provided by a concrete subclass) so that connecting,
 * disconnecting, sending, and receiving can be syncronized
 * properly. Apparatus is provided to send and receive requests
 * concurrently.
 */

/**

   * Returns a serializable form of this object. Non-public subclasses should not override this
   * method. Publicly-accessible subclasses must override this method and should return a subclass
   * of SerializedForm whose readResolve() method returns objects of the subclass type.
   */
  @J2ktIncompatible // serialization
  Object writeReplace() {
    return new SerializedForm<>(this);
  }

Et les outils seront également satisfaits car `RedirectResponse` et `JSONResponse` sont des sous-classes de `Response`, donc l'annotation de type est correcte.

### Annoter une sous-classe de Response { #annotate-a-response-subclass }

Vous pouvez aussi utiliser une sous-classe de `Response` dans l'annotation de type :

{* ../../docs_src/response_model/tutorial003_03_py310.py hl[8:9] *}

   * Returns a serializable form of this object. Non-public subclasses should not override this
   * method. Publicly-accessible subclasses must override this method and should return a subclass
   * of SerializedForm whose readResolve() method returns objects of the subclass type.
   */
  @J2ktIncompatible // serialization
  Object writeReplace() {
    return new SerializedForm<>(this);
  }

       * more information, see the comments in that class.
       *
       * We already know that that's how it behaves, and subclasses of Converter can't change that
       * behavior. So there's no sense in making all subclass authors exclude the method from any
       * NullPointerTester tests that they have.
       */
      ignoredMembers.add(Converter.class.getMethod("apply", Object.class));
    } catch (NoSuchMethodException shouldBeImpossible) {

这个简单场景 FastAPI 会自动处理，因为返回类型注解是 `Response`（或其子类）。

工具也会满意，因为 `RedirectResponse` 和 `JSONResponse` 都是 `Response` 的子类，所以类型注解是正确的。

### 注解 Response 的子类 { #annotate-a-response-subclass }

你也可以在类型注解中使用 `Response` 的子类：

{* ../../docs_src/response_model/tutorial003_03_py310.py hl[8:9] *}

这同样可行，因为 `RedirectResponse` 是 `Response` 的子类，FastAPI 会自动处理这个简单场景。

    //                                                                    Helper Classes
    //                                                                    ================

    /**
     * Testable subclass that bypasses ComponentUtil dependencies.
     * This allows testing the filter logic without requiring the DI container.
     */
    private static class TestableLoadControlFilter extends LoadControlFilter {