url = server.url("/")
    setLevel(Level.BODY)
    server.enqueue(
      MockResponse
        .Builder()
        .body("Hello response!")
        .build(),
    )
    val asyncRequestBody: RequestBody =
      object : RequestBody() {
        override fun contentType(): MediaType? = null

        override fun writeTo(sink: BufferedSink) {
          sink.writeUtf8("Hello request!")