Kooboo.Commerce.Carts.ShoppingCartService.Find C# (CSharp) Method

        public ShoppingCart Find(int id)
        {
            var cart = _repository.Find(id);
            if (cart.SessionId != null && cart.SessionId.StartsWith("EXPIRED_"))
            {
                cart = null;
            }

            return cart;
        }

 public bool ApplyCoupon(int cartId, string coupon)
 {
     return _context.Database.Transactional(() =>
     {
         var service = new Core.ShoppingCartService(_context.Instance);
         var cart = service.Find(cartId);
         return service.ApplyCoupon(cart, coupon);
     });
 }