client = null,
          carrier = this,
          source = source,
          sink = sink,
        )
      source.timeout().timeout(readTimeoutMillis.toLong(), TimeUnit.MILLISECONDS)
      sink.timeout().timeout(writeTimeoutMillis.toLong(), TimeUnit.MILLISECONDS)
      tunnelCodec.writeRequest(nextRequest.headers, requestLine)
      tunnelCodec.finishRequest()
      val response =