private static HashSet <String> CheckAlreadyAckedIdsWith(List <String> ids)
        {
            FlexCache        cache    = new FlexCache();
            HashSet <String> ackedIds = cache.GetIntersectWithSet("ackedCollectionSet", ids);

            return(ackedIds);
        }
        private static void RemoveAckedIdsFromCache()
        {
            List <string> ids   = RawData.batchCreated();
            FlexCache     cache = new FlexCache();

            cache.RemoveItemsFromSet("ackedCollectionSet", ids);
        }
        private static void AddAckedIdsToCache()
        {
            List <string> ids   = RawData.acked();
            FlexCache     cache = new FlexCache();

            cache.AddItemsToSet("ackedCollectionSet", ids);
        }