public List <string> GetImportableItems(int packageId, int itemTypeId, Type itemType,
                                                ResourceGroupInfo group)
        {
            List <string> items = new List <string>();

            // get service id
            int serviceId = PackageController.GetPackageServiceId(packageId, group.GroupName);

            if (serviceId == 0)
            {
                return(items);
            }

            OS.OperatingSystem os = GetOS(serviceId);
            if (itemType == typeof(SystemDSN))
            {
                items.AddRange(os.GetDSNNames());
            }

            return(items);
        }