e private Money (BigInteger amountInPennies Currency currency, boolean privacy Marker)i Assert notNull(amountInPennies) Assert notNull(currency) this amount amountIn Pennies this currency currency e public Money negate t return new Money(amount negate(, currency, trueprivate Money(BigInteger amountInPennies, Currency currency, boolean privacyMarker) { // Assert.notNull(amountInPennies); // Assert.notNull(currency); this.amount = amountInPennies; this.currency = currency; } public Money negate() { return new Money(amount.negate(), currency, true); }