public static List <EquipmentInfoData> Get_equipmentList_X(this ModelManager mmng)
        {
            List <EquipmentInfoData> list = mmng.GetEquipmentList();

            if (list == null)
            {
                list = mmng.GetData <List <EquipmentInfoData> >(EModelType.Model_equipmentList);
            }
            return(list);
        }