GregorianCalendar cal = new GregorianCalendar();

        sdf.setCalendar(cal);

        dirents = dir.listFiles();
        if ( log.isDebugEnabled() ) {
            log.debug(dirents.length + " items listed");
        }
        sorted = new LinkedList<>();
        if ( ( fmt = req.getParameter("fmt") ) == null ) {
            fmt = "col";
        }
        sort = 0;

// order please use this option.
func (d *Decoder) ObjectAsKVS() *Decoder {
	d.objectAsKVS = true
	return d
}

// EmitKV enables emitting a jstream.KV struct when the items(s) parsed
// at configured emit depth are within a JSON object. By default, only
// the object values are emitted.
func (d *Decoder) EmitKV() *Decoder {
	d.emitKV = true
	return d
}

	scope := pkg.Scope()
	for _, name := range scope.Names() {
		if token.IsExported(name) {
			w.emitObj(scope.Lookup(name))
		}
	}
	pop()
}

func set(items []string) map[string]bool {
	s := make(map[string]bool)
	for _, v := range items {
		s[v] = true
	}
	return s
}

var spaceParensRx = regexp.MustCompile(` \(\S+?\)`)

func featureWithoutContext(f string) string {

	VersionsSort WalkVersionsSortOrder    // sort order for versions of the same object; default: Ascending order in ModTime
	Limit        int                      // maximum number of items, 0 means no limit
}

// ExpirationOptions represents object options for object expiration at objectLayer.
type ExpirationOptions struct {
	Expire bool
}

    def get_model_fields(model: Type[BaseModel]) -> List[ModelField]:
        return [
            ModelField(field_info=field_info, name=name)
            for name, field_info in model.model_fields.items()
        ]

else:
    from fastapi.openapi.constants import REF_PREFIX as REF_PREFIX
    from pydantic import AnyUrl as Url  # noqa: F401
    from pydantic import (  # type: ignore[assignment]

```

////

/// note

注意，`response_model`是「装饰器」方法（`get`，`post` 等）的一个参数。不像之前的所有参数和请求体，它不属于*路径操作函数*。

///

它接收的类型与你将为 Pydantic 模型属性所声明的类型相同，因此它可以是一个 Pydantic 模型，但也可以是一个由 Pydantic 模型组成的 `list`，例如 `List[Item]`。

FastAPI 将使用此 `response_model` 来：

* 将输出数据转换为其声明的类型。
* 校验数据。
* 在 OpenAPI 的*路径操作*中为响应添加一个 JSON Schema。
* 并在自动生成文档系统中使用。

但最重要的是：

* 会将输出数据限制在该模型定义内。下面我们会看到这一点有多重要。

/// note | "技术细节"

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

/*
Package builtin provides documentation for Go's predeclared identifiers.
The items documented here are not actually in package builtin
but their descriptions here allow godoc to present documentation
for the language's special identifiers.
*/
package builtin

import "cmp"

### Validación

* Validación para la mayoría (¿o todos?) los **tipos de datos** de Python incluyendo:
    * Objetos JSON (`dict`).
    * JSON array (`list`) definiendo tipos de ítem.
    * Campos de texto (`str`) definiendo longitudes mínimas y máximas.
    * Números (`int`, `float`) con valores mínimos y máximos, etc.

* Validación para tipos más exóticos como:
    * URL.
    * Email.

 *
 * <p>Advantages compared to {@code long[]}:
 *
 * <ul>
 *   <li>All the many well-known advantages of immutability (read <i>Effective Java</i>, third
 *       edition, Item 17).
 *   <li>Has the value-based (not identity-based) {@link #equals}, {@link #hashCode}, and {@link
 *       #toString} behavior you expect.

 *
 * <p>Advantages compared to {@code int[]}:
 *
 * <ul>
 *   <li>All the many well-known advantages of immutability (read <i>Effective Java</i>, third
 *       edition, Item 17).
 *   <li>Has the value-based (not identity-based) {@link #equals}, {@link #hashCode}, and {@link
 *       #toString} behavior you expect.