public ActionResult IndexTableAjax(string sortBy = "Id", bool orderByDescending = false)
        {
            IEnumerable <InternetPackage>        internetPackages              = actions.GetAll();
            IEnumerable <InternetPackage>        internetPackagesSorted        = actions.Sort(internetPackages, sortBy, orderByDescending);
            IEnumerable <InternetPackageDetails> internetPackagesDetailsSorted = internetPackagesSorted.Select(internetPackage => new InternetPackageDetails(internetPackage)).ToArray();

            return(PartialView(internetPackagesDetailsSorted));
        }