Trace       func(msg string) // Trace when starting.
	IdleTimeout time.Duration    // Incoming TCP read/write timeout
}

// ForWebsocket returns TCPOptions valid for websocket net.Conn
func (t TCPOptions) ForWebsocket() TCPOptions {
	return TCPOptions{
		UserTimeout: t.UserTimeout,
		Interface:   t.Interface,
		SendBufSize: t.SendBufSize,
		RecvBufSize: t.RecvBufSize,

		// useful over persistent connections.
		Dialer: grid.ConnectWS(
			grid.ContextDialer(xhttp.DialContextWithLookupHost(lookupHost, xhttp.NewInternodeDialContext(rest.DefaultTimeout, globalTCPOptions.ForWebsocket()))),
			newCachedAuthToken(),
			&tls.Config{
				RootCAs:          globalRootCAs,
				CipherSuites:     crypto.TLSCiphers(),
				CurvePreferences: crypto.TLSCurveIDs(),
			}),
		Local:        local,

 * canceling may break the entire connection.
 */
class RealCall(
  val client: OkHttpClient,
  /** The application's original request unadulterated by redirects or auth headers. */
  val originalRequest: Request,
  val forWebSocket: Boolean,
) : Call,
  Cloneable,
  Lockable {
  private val connectionPool: RealConnectionPool = client.connectionPool.delegate

  @Volatile

      writeTimeoutMillis = 10_000,
    )

  fun newRoutePlanner(
    client: OkHttpClient,
    address: Address = newAddress(),
  ): RealRoutePlanner {
    val call = RealCall(client, Request(address.url), forWebSocket = false)
    val chain = newChain(call)
    return RealRoutePlanner(
      taskRunner = client.taskRunner,
      connectionPool = client.connectionPool.delegate,
      readTimeoutMillis = client.readTimeoutMillis,

          readyAsyncCalls.add(enqueuedCall)

          // Mutate the AsyncCall so that it shares the AtomicInteger of an existing running call to
          // the same host.
          if (!enqueuedCall.call.forWebSocket) {
            val existingCall = findExistingCallWithHost(enqueuedCall.host)
            if (existingCall != null) enqueuedCall.reuseCallsPerHostFrom(existingCall)
          }
        }

        val becameIdle =

        .header("Sec-WebSocket-Key", key)
        .header("Sec-WebSocket-Version", "13")
        .header("Sec-WebSocket-Extensions", "permessage-deflate")
        .build()
    call = RealCall(webSocketClient, request, forWebSocket = true)
    call!!.enqueue(
      object : Callback {
        override fun onResponse(
          call: Call,
          response: Response,
        ) {
          val socket =
            try {

    }
  }

  /** Prepares the [request] to be executed at some point in the future. */
  override fun newCall(request: Request): Call = RealCall(this, request, forWebSocket = false)

  /** Uses [request] to connect a new web socket. */
  override fun newWebSocket(
    request: Request,
    listener: WebSocketListener,
  ): WebSocket {
    val webSocket =