@Deprecated(since = "4.0.0")
public interface ModelProblem {

    /**
     * The different severity levels for a problem, in decreasing order.
     */
    enum Severity {
        FATAL, //
        ERROR, //
        WARNING //
    }

    /**
     * Version
     */
    enum Version {
        // based on ModeBuildingResult.validationLevel
        BASE,
        V20,
        V30,
        V31,
        V40,
        V41

response = client.get('/')
```

...that we used to make our requests with the `TestClient`.

/// tip

Note that we're using async/await with the new `AsyncClient` - the request is asynchronous.

///

/// warning

# 路径操作配置

*路径操作装饰器*支持多种配置参数。

/// warning | 警告

注意：以下参数应直接传递给**路径操作装饰器**，不能传递给*路径操作函数*。

///

## `status_code` 状态码

`status_code` 用于定义*路径操作*响应中的 HTTP 状态码。

可以直接传递 `int` 代码， 比如 `404`。

如果记不住数字码的涵义，也可以用 `status` 的快捷常量：

{* ../../docs_src/path_operation_configuration/tutorial001.py hl[3,17] *}

状态码在响应中使用，并会被添加到 OpenAPI 概图。

/// note | 技术细节

也可以使用 `from starlette import status` 导入状态码。

   * number of users will need this method to cover map or collection types that {@link
   * MultimapBuilder} does not support.
   *
   * <p><b>Warning: do not use</b> this method when the collections returned by {@code factory}
   * implement either {@link List} or {@code Set}! Use the more specific method {@link

Тот же пример сверху, возвращающий `HTMLResponse`, может выглядеть так:

{* ../../docs_src/custom_response/tutorial003_py39.py hl[2,7,19] *}

/// warning | Предупреждение

   * that no character encoding is performed; the low byte and high byte of each {@code char} are
   * hashed directly (in that order).
   *
   * <p><b>Warning:</b> This method will produce different output than most other languages do when
   * running the same hash function on the equivalent input. For cross-language compatibility, use

   * that no character encoding is performed; the low byte and high byte of each {@code char} are
   * hashed directly (in that order).
   *
   * <p><b>Warning:</b> This method will produce different output than most other languages do when
   * running the same hash function on the equivalent input. For cross-language compatibility, use

        def validate(cls, v: Any) -> str:
            logger.warning(
                "email-validator not installed, email fields will be treated as str.\n"
                "To install, run: pip install email-validator"
            )
            return str(v)

        @classmethod
        def _validate(cls, __input_value: Any, _: Any) -> str:
            logger.warning(

... welches wir verwendet haben, um unsere Requests mit dem `TestClient` zu machen.

/// tip | Tipp

Beachten Sie, dass wir async/await mit dem neuen `AsyncClient` verwenden – der Request ist asynchron.

///

/// warning | Achtung

 * if key or value objects already present in the multimap change in a manner that affects
 * {@code equals} comparisons. Use caution if mutable objects are used as keys or values in a {@code
 * SetMultimap}.
 *
 * <p><b>Warning:</b> Do not modify either a key <i>or a value</i> of a {@code SetMultimap} in a way
 * that affects its {@link Object#equals} behavior. Undefined behavior and bugs will result.
 *
 * <p>See the Guava User Guide article on <a href=