public DateTimeOffset GetLastModifiedDate(string entityName)
{
entityName ??= string.Empty;
var cacheKey = CacheKey.With(GetType(), nameof(GetLastModifiedDate), entityName);
return(_memoryCache.GetOrCreateExclusive(cacheKey, options =>
{
options.AddExpirationToken(LastChangesCacheRegion.CreateChangeTokenForKey(entityName));
return DateTimeOffset.UtcNow;
}));
}