)
    val sinkReference = AtomicReference<BufferedSink>()
    val response =
      getResponse(
        Request(
          url = server.url("/"),
          body =
            object : ForwardingRequestBody(transferKind.newRequestBody("def")) {
              override fun writeTo(sink: BufferedSink) {
                sinkReference.set(sink)
                super.writeTo(sink)
              }
            },