.body(protocol, "Hello")
        .trailersDelay(500, TimeUnit.MILLISECONDS)
        .build(),
    )

    val call = client.newCall(Request(server.url("/")))
    call.execute().use { response ->
      val source = response.body.source()
      assertThat(source.readUtf8(5)).isEqualTo("Hello")
      val trailersDelay =
        measureTime {
          val trailers = response.trailers()