// Call 1: set a deadline on the request body.
    val requestBody1: RequestBody =
      object : RequestBody() {
        override fun contentType(): MediaType = "text/plain".toMediaType()

        override fun writeTo(sink: BufferedSink) {
          sink.writeUtf8("abc")
          sink.timeout().deadline(5, TimeUnit.SECONDS)
        }
      }
    val request1 =
      Request.Builder()
        .url(server.url("/"))