/// info

The `OAuth2PasswordRequestForm` is not a special class for **FastAPI** as is `OAuth2PasswordBearer`.

`OAuth2PasswordBearer` makes **FastAPI** know that it is a security scheme. So it is added that way to OpenAPI.

But `OAuth2PasswordRequestForm` is just a class dependency that you could have written yourself, or you could have declared `Form` parameters directly.

* 適当な型に変換します（必要な場合）。
* データを検証します。
    * データが無効な場合は、明確なエラーが返され、どこが不正なデータであったかを示します。
* 受け取ったデータをパラメータ `item` に変換します。
    * 関数内で `Item` 型であると宣言したので、すべての属性とその型に対するエディタサポート（補完など）をすべて使用できます。
* モデルの<a href="http://json-schema.org" class="external-link" target="_blank">JSONスキーマ</a>定義を生成し、好きな場所で使用することができます。
* これらのスキーマは、生成されたOpenAPIスキーマの一部となり、自動ドキュメントの<abbr title = "User Interfaces">UI</abbr>に使用されます。

## 自動ドキュメント生成

import java.util.Objects;
import javax.annotation.CheckForNull;
import org.checkerframework.checker.nullness.qual.Nullable;

/**
 * A binary encoding scheme for reversibly translating between byte sequences and printable ASCII
 * strings. This class includes several constants for encoding schemes specified by <a
 * href="http://tools.ietf.org/html/rfc4648">RFC 4648</a>. For example, the expression:
 *
 * <pre>{@code

syntax = "proto2";

package k8s.io.api.authorization.v1beta1;

import "k8s.io/apimachinery/pkg/apis/meta/v1/generated.proto";
import "k8s.io/apimachinery/pkg/runtime/generated.proto";
import "k8s.io/apimachinery/pkg/runtime/schema/generated.proto";

// Package-wide variables from generator "generated".
option go_package = "k8s.io/api/authorization/v1beta1";

// ExtraValue masks the value so protobuf can generate
// +protobuf.nullable=true

- The `CustomResourceDefaulting` feature is promoted to beta and enabled by default. Defaults may be specified in structural schemas via the `apiextensions.k8s.io/v1` API. See https://kubernetes.io/docs/tasks/access-kubernetes-api/custom-resources/custom-resource-definitions/#specifying-a-structural-schema for details. ([#81872](https://github.com/kubernetes/kubernetes/pull/81872), [@sttts](https://github.com/sttts))

import "k8s.io/apimachinery/pkg/api/resource/generated.proto";
import "k8s.io/apimachinery/pkg/apis/meta/v1/generated.proto";
import "k8s.io/apimachinery/pkg/runtime/generated.proto";
import "k8s.io/apimachinery/pkg/runtime/schema/generated.proto";

// Package-wide variables from generator "generated".
option go_package = "k8s.io/api/autoscaling/v2beta2";

// ContainerResourceMetricSource indicates how to scale on a resource metric known to

	// ErrMalformedXML - generic error indicating malformed XML
	ErrMalformedXML = errors.New("the XML you provided was not well-formed or did not validate against our published schema")
)

const (
	ntpServerEnv = "MINIO_NTP_SERVER"
)

var ntpServer = env.Get(ntpServerEnv, "")

// UTCNowNTP - is similar in functionality to UTCNow()

labels.popularWord=Popular words
labels.ignoreFailureType=Ignored Failure Type
labels.lastAccessTime=Last Accessed
labels.notificationTo=Notification To
labels.num=Num
labels.pn=Page Number
labels.protocolScheme=Scheme
labels.purgeByBots=Purge By Bots
labels.logLevel=Log Level
labels.purgeSearchLogDay=Purge Search Log
labels.query=Query
labels.queryId=Query ID
labels.rt=rt
labels.searchLog=Search Log
labels.sort=Sort

- Erasure coding used by MinIO is [Reed-Solomon](https://github.com/klauspost/reedsolomon) erasure coding scheme, which has a total shard maximum of 256 i.e 128 data and 128 parity. MinIO design goes beyond this limitation by doing some practical architecture choices.

   *
   * @param streamId client-initiated stream ID.  Must be an odd number.
   * @param promisedStreamId server-initiated stream ID.  Must be an even number.
   * @param requestHeaders minimally includes `:method`, `:scheme`, `:authority`, and `:path`.
   */
  @Throws(IOException::class)
  fun pushPromise(
    streamId: Int,
    promisedStreamId: Int,
    requestHeaders: List<Header>,
  ) {
    this.withLock {