* remain in flight.
   */
  var maxRequests = 64
    get() = this.withLock { field }
    set(maxRequests) {
      require(maxRequests >= 1) { "max < 1: $maxRequests" }
      this.withLock {
        field = maxRequests
      }
      promoteAndExecute()
    }

  /**

!!! tip
    Notice how each model's attribute with a type, default value and `Field` has the same structure as a *path operation function's* parameter, with `Field` instead of `Path`, `Query` and `Body`.

## Add extra information

You can declare extra information in `Field`, `Query`, `Body`, etc. And it will be included in the generated JSON Schema.

!!! tip "提示"

    注意，模型属性的类型、默认值及 `Field` 的代码结构与*路径操作函数*的参数相同，只不过是用 `Field` 替换了`Path`、`Query`、`Body`。

## 添加更多信息

`Field`、`Query`、`Body` 等对象里可以声明更多信息，并且 JSON Schema 中也会集成这些信息。

*声明示例*一章中将详细介绍添加更多信息的知识。

## 小结

Pydantic 的 `Field` 可以为模型属性声明更多校验和元数据。

  // This field is set via the /status subresource. Once populated, this field is immutable.
  //
  // If the certificate signing request is denied, a condition of type "Denied" is added and this field remains empty.
  // If the signer cannot issue the certificate, a condition of type "Failed" is added and this field remains empty.
  //
  // Validation requirements:

  // Other drivers can leave pod info disabled and/or ignore this field.
  // As Kubernetes 1.15 doesn't support this field, drivers can only support one mode when
  // deployed on such a cluster and the deployment determines which mode that is, for example
  // via a command line parameter of the driver.
  //
  // This field is immutable.
  //
  // +optional
  optional bool podInfoOnMount = 2;

	public static final field TLS_KRB5_WITH_RC4_128_SHA Lokhttp3/CipherSuite;
	public static final field TLS_PSK_WITH_3DES_EDE_CBC_SHA Lokhttp3/CipherSuite;
	public static final field TLS_PSK_WITH_AES_128_CBC_SHA Lokhttp3/CipherSuite;
	public static final field TLS_PSK_WITH_AES_256_CBC_SHA Lokhttp3/CipherSuite;
	public static final field TLS_PSK_WITH_RC4_128_SHA Lokhttp3/CipherSuite;

                $annotatedKotlinMembers

                /** @since 2.0 */
                @field:Incubating
                const val cathedral = "cathedral"
            """
        ) {

            assertHasNoWarning()
            assertHasInformation(
                newApi("Field", "cathedral"),
                newApi("Method", "SourceKt.foo()"),

public final class okhttp3/dnsoverhttps/DnsOverHttps : okhttp3/Dns {
	public static final field Companion Lokhttp3/dnsoverhttps/DnsOverHttps$Companion;
	public static final field MAX_RESPONSE_SIZE I
	public final fun client ()Lokhttp3/OkHttpClient;
	public final fun includeIPv6 ()Z
	public fun lookup (Ljava/lang/String;)Ljava/util/List;
	public final fun post ()Z
	public final fun resolvePrivateAddresses ()Z
	public final fun resolvePublicAddresses ()Z

  // See documentation for the "matchPolicy" field in the webhook configuration type.
  // +optional
  optional string requestSubResource = 15;

  // Name is the name of the object as presented in the request.  On a CREATE operation, the client may omit name and
  // rely on the server to generate the name.  If that is the case, this field will contain an empty string.
  // +optional
  optional string name = 5;

  // See documentation for the "matchPolicy" field in the webhook configuration type.
  // +optional
  optional string requestSubResource = 15;

  // Name is the name of the object as presented in the request.  On a CREATE operation, the client may omit name and
  // rely on the server to generate the name.  If that is the case, this field will contain an empty string.
  // +optional
  optional string name = 5;