public static PickupCommand Parse(int mode)
        {
            PickupCommandType cmdType = (PickupCommandType)
                                        Enum.Parse(typeof(PickupCommandType), mode.ToString());

            return(new PickupCommand(cmdType));
        }
        //ADD/DELETE

        public PickupCommand(PickupCommandType mode)
        {
            this.Mode = mode;
        }