private static List<FolderChildrenDateCreated> GetChildItemsInformation<T>(Guid[] ids, IQueryable<T> childItems)
            where T : Content, IHasParent
        {
            childItems = childItems.Where(p => (ids.Contains(p.Parent.Id)));

            return childItems.GroupBy(p => p.Parent.Id).Where(ch => ch.Count() > 0)
                          .Select(chi => new FolderChildrenDateCreated(chi.Key, chi.Max<T, DateTime>(i => i.DateCreated))).ToList();
        }