public DateTimeOffset GetLastModified(string module)
        {
            var cacheKey = CacheKey.With(GetType(), "LastModifiedDateTime", module);

            return(PlatformCache.GetOrCreateExclusive(cacheKey, (cacheEntry) =>
            {
                cacheEntry.AddExpirationToken(ChangesCollectorCacheRegion.CreateChangeTokenForKey(module));
                return DateTimeOffset.Now;
            }));
        }