public IMoney addMoneyBag(MoneyBag s) {
return s.addMoney(this);
}
public /*this makes no sense*/ void appendTo(MoneyBag m) {
m.appendMoney(this);
}
public IMoney addMoney(Money m) {
if (m.currency().equals(currency())) return new Money(amount() + m.amount(), currency());
return MoneyBag.create(this, m);
}
