public void Apply(Rating rating)
{
try
{
var adjustedAmount = rating.ApplyTo(amount);
var difference = adjustedAmount - amount;
amount = adjustedAmount;
ApplyEvent(new RatingApplied(rating.GetType().Name, adjustedAmount, difference));
}
catch (DeclinedException exception)
{
ApplyEvent(new Declined(exception.Reason));
}
}