"Expected status to be %s, but it was %s",
          oldStatus,
          newStatus);
    }

    boolean compareAndUpdateStatus(Status oldStatus, Status newStatus) {
      return status.compareAndSet(oldStatus, newStatus);
    }

    void close() {
      logger.get().log(FINER, "closing {0}", closingFutureToString());
      closeables.close();
    }

    val ifNoneMatch = AtomicReference<String?>()
    client =
      client
        .newBuilder()
        .addNetworkInterceptor(
          Interceptor { chain: Interceptor.Chain ->
            ifNoneMatch.compareAndSet(null, chain.request().header("If-None-Match"))
            chain.proceed(chain.request())
          },
        ).build()

    // Confirm the value is cached and intercepted.