public virtual async Task <PromotionResult> EvaluatePromotionsAsync()
{
EnsureCartExists();
var promotionResult = new PromotionResult();
if (!LineItems.IsNullOrEmpty() && !LineItems.Any(i => i.IsReadOnly))
{
var evalContext = _mapper.Map <PromotionEvaluationContext>(this);
promotionResult = await EvaluatePromotionsAsync(evalContext);
}
return(promotionResult);
}