}
    }

    private
    fun <T> runWorkThatContributesToCacheEntry(action: () -> T): T {
        prepareForWork()
        try {
            return action()
        } finally {
            doneWithWork()
        }
    }

    private
    fun prepareForWork() {
        prepareConfigurationTimeBarrier()
        startCollectingCacheFingerprint()