.build(),
    )
    server.enqueue(
      MockResponse.Builder()
        .code(HttpURLConnection.HTTP_NOT_MODIFIED)
        .addHeader("B: b4")
        .addHeader("B: b5")
        .addHeader("C: c6")
        .build(),
    )
    val response1 = get(server.url("/"))
    assertThat(response1.body.string()).isEqualTo("abcd")
    assertThat(response1.headers).isEqualTo(
      headersOf(