(LocalLoadingCache)
            CacheBuilder.newBuilder()
                .weakKeys()
                .softValues()
                .expireAfterAccess(123, SECONDS)
                .expireAfterWrite(456, MINUTES)
                .maximumWeight(789)
                .weigher(weigher)
                .concurrencyLevel(12)
                .removalListener(listener)
                .ticker(ticker)

        headers =
          headersOf(
            "B",
            "123",
            "B",
            "234",
          ),
      ),
    )
    executeSynchronously("/", "A", "345", "A", "456")
      .assertCode(200)
      .assertHeader("B", "123", "234")
    val recordedRequest = server.takeRequest()
    assertThat(recordedRequest.headers.values("A")).containsExactly("345", "456")
  }

  @Test