void ICost.Observe(IPayabilityObserver observer, Game game)
{
observer.NotifyPayable(true, this);
}
void ICost.Observe(IPayabilityObserver observer, Game game)
{
observers.Add(observer);
observer.NotifyPayable(allowed, this);
}
void ICost.Observe(IPayabilityObserver observer, Game game)
{
observers.Add(observer);
observer.NotifyPayable(card.Active, this);
}