code: public LookupCacheStats minus(LookupCacheStats other)
    {
      return new LookupCacheStats(
          Math.max(0, hitCount - other.hitCount),
          Math.max(0, missCount - other.missCount),
          Math.max(0, evictionCount - other.evictionCount)
      );
    }
docs: Returns a new {@code CacheStats} representing the difference between this {@code CacheStats}
  and {@code other}. Negative values, which aren't supported by {@code CacheStats} will be
  rounded up to zero.