rawSocket.port,
            true,
          ) as SSLSocket
        sslSocket.use {
          sslSocket.useClientMode = false
          sslSocket.wantClientAuth = true
          sslSocket.startHandshake()
          return@submit sslSocket.session.handshake()
        }
      }
    }
  }

  private fun doClientHandshake(
    client: HandshakeCertificates,
    serverAddress: InetSocketAddress,

  override fun removeHandshakeCompletedListener(listener: HandshakeCompletedListener) {
    delegate!!.removeHandshakeCompletedListener(listener)
  }

  @Throws(IOException::class)
  override fun startHandshake() {
    delegate!!.startHandshake()
  }

  override fun setUseClientMode(mode: Boolean) {
    delegate!!.useClientMode = mode
  }

  override fun getUseClientMode(): Boolean = delegate!!.useClientMode

        socket.port,
        true,
      ) as SSLSocket
    sslSocket.useClientMode = false
    Platform.get().configureTlsExtensions(sslSocket, null, listOf(Protocol.HTTP_2))
    sslSocket.startHandshake()
    return sslSocket
  }

  override fun onStream(stream: Http2Stream) {
    try {
      val requestHeaders = stream.takeHeaders()
      var path: String? = null
      var i = 0

      if (connectionSpec.supportsTlsExtensions) {
        Platform.get().configureTlsExtensions(sslSocket, address.url.host, address.protocols)
      }

      // Force handshake. This can throw!
      sslSocket.startHandshake()
      // block for session establishment
      val sslSocketSession = sslSocket.session
      val unverifiedHandshake = sslSocketSession.handshake()

          openClientSockets.add(sslSocket)

          if (protocolNegotiationEnabled) {
            Platform.get().configureTlsExtensions(sslSocket, null, protocols)
          }

          sslSocket.startHandshake()

          // Wait until after handshake to grab the buffered socket
          socket = MockWebServerSocket(sslSocket)

          if (protocolNegotiationEnabled) {