public static void DoPveBuy(ShopInfo shopInfo, Units unit, string targetItemID, List <ItemInfo> possessItemsP, int realPrice)
        {
            List <ItemInfo> list        = new List <ItemInfo>(possessItemsP);
            List <string>   composition = BattleEquipTools_Travers.GetComposition(targetItemID, list);

            if (composition != null || composition.Count > 0)
            {
                for (int i = 0; i < composition.Count; i++)
                {
                    ItemInfo target;
                    int      index;
                    if (BattleEquipTools_Travers.GetItem_last_least(list, composition[i], out target, out index))
                    {
                        BattleEquipTools_op.RemoveItem(list, target, index);
                    }
                }
            }
            BattleEquipTools_op.AddItem(list, targetItemID);
            BattleEquipTools_op.ChangeHeroMoney(unit.unique_id, -realPrice);
            BattleEquipTools_op.SetHeroItems(unit, list);
            byte[] msgParam = SerializeHelper.Serialize <P2CBuyItem>(new P2CBuyItem
            {
                itemoid  = 0,
                retaCode = 0
            });
            MobaMessage message = MobaMessageManager.GetMessage(PvpCode.C2P_BuyItem, msgParam, 0f, null);

            MobaMessageManager.DispatchMsg(message);
        }