@Override
        public int compareTo(File another) {
            // Sort by last modified time.
            long result = lastModified() - another.lastModified();
            if (result == 0) {
                return super.compareTo(another);
            }
            return result < 0 ? -1 : 1;
        }
A file containing a piece of cached data.
common/src/main/java/org/conscrypt/FileClientSessionCache.java