eventListener.requestFailed(call, e)
      trackFailure(e)
      throw e
    }
  }

  @Throws(IOException::class)
  fun createRequestBody(
    request: Request,
    duplex: Boolean,
  ): Sink {
    this.isDuplex = duplex
    val contentLength = request.body!!.contentLength()
    eventListener.requestBodyStart(call)
    val rawRequestBody = codec.createRequestBody(request, contentLength)

    Interceptors that rewrite or replace the request body may now inadvertently interfere with
    duplex request bodies. Such interceptors should check `RequestBody.isDuplex()` and avoid
    accessing the request body when it is.

    Duplex calls require HTTP/2. If HTTP/1 is established instead the duplex call will fail. The
    most common use of duplex calls is [gRPC][grpc_http2].

タイプがなければ、それはほぼ不可能です。

変数`item`はリスト`items`の要素の一つであることに注意してください。

それでも、エディタはそれが`str`であることを知っていて、そのためのサポートを提供しています。

#### `Tuple` と `Set`

`tuple`と`set`の宣言も同様です:

{* ../../docs_src/python_types/tutorial007.py hl[1,4] *}


つまり:

* 変数`items_t`は`int`、`int`、`str`の3つの項目を持つ`tuple`です

* 変数`items_s`はそれぞれの項目が`bytes`型である`set`です。

#### `Dict`

`dict`を宣言するためには、カンマ区切りで2つの型パラメータを渡します。

import okhttp3.Protocol
import okhttp3.RecordingEventListener
import okhttp3.RecordingHostnameVerifier
import okhttp3.Request
import okhttp3.RequestBody.Companion.toRequestBody
import okhttp3.internal.duplex.MockSocketHandler
import okhttp3.testing.PlatformRule
import okio.ProtocolException
import okio.buffer
import okio.use
import org.junit.jupiter.api.Test
import org.junit.jupiter.api.extension.RegisterExtension

pkg go/types, method (*Struct) Tag(int) string
pkg go/types, method (*Struct) Underlying() Type
pkg go/types, method (*Tuple) At(int) *Var
pkg go/types, method (*Tuple) Len() int
pkg go/types, method (*Tuple) String() string
pkg go/types, method (*Tuple) Underlying() Type
pkg go/types, method (*TypeName) Exported() bool
pkg go/types, method (*TypeName) Id() string
pkg go/types, method (*TypeName) Name() string

    private set

  // These properties are guarded by `this`. They are typically only accessed by the thread executing
  // the call, but they may be accessed by other threads for duplex requests.

  /** True if this call still has a request body open. */
  private var requestBodyOpen = false

  /** True if this call still has a response body open. */
  private var responseBodyOpen = false

          exchange.responseHeadersStart()
          invokeStartEvent = false
        }
        if (responseBuilder == null) {
          if (requestBody.isDuplex()) {
            // Prepare a duplex body so that the application can send a request body later.
            exchange.flushRequest()
            val bufferedRequestBody = exchange.createRequestBody(request, true).buffer()

import kotlin.test.assertFailsWith
import mockwebserver3.MockResponse
import mockwebserver3.MockWebServer
import mockwebserver3.junit5.StartStop
import okhttp3.Headers.Companion.headersOf
import okhttp3.internal.duplex.AsyncRequestBody
import okhttp3.testing.PlatformRule
import okio.BufferedSink
import okio.IOException
import org.junit.jupiter.api.BeforeEach
import org.junit.jupiter.api.Disabled
import org.junit.jupiter.api.Tag

   * delimited by 'null'.
   *
   * @param callerIsIdle true if the caller isn't sending any more bytes until the peer responds.
   *     This is true after a `Expect-Continue` request, false for duplex requests, and false for
   *     all other requests.
   */
  @Throws(IOException::class)
  fun takeHeaders(callerIsIdle: Boolean = false): Headers {
    withLock {

pkg go/types, func Instantiate(*Context, Type, []Type, bool) (Type, error)
pkg go/types, func NewContext() *Context
pkg go/types, func NewSignature //deprecated
pkg go/types, func NewSignatureType(*Var, []*TypeParam, []*TypeParam, *Tuple, *Tuple, bool) *Signature
pkg go/types, func NewTerm(bool, Type) *Term
pkg go/types, func NewTypeParam(*TypeName, Type) *TypeParam
pkg go/types, func NewUnion([]*Term) *Union
pkg go/types, method (*ArgumentError) Error() string