public virtual async Task <Cart?> Get(string id, CancellationToken cancellationToken = default)
{
var dbCart = await _cartResolver.Get(id, cancellationToken);
return(dbCart == null ? null : new Cart()
{
Id = dbCart.Id,
Items = dbCart.Items.ToImmutableDictionary(i => i.DbProductId, i => i.Quantity),
});
}
