server.enqueue(
      MockResponse.Builder()
        .clearHeaders()
        .addHeader("h1", "v1")
        .addHeader("h2", "v2")
        .chunkedBody("HelloBonjour", 1024)
        .trailers(headersOf("trailers", "boom"))
        .build(),
    )
    val call = client.newCall(Request(server.url("/")))
    val response = call.execute()