public boolean equals(Object other) {
		if (this == other) {
			return true;
		}
		if (!(other instanceof PaymentPK)) {
			return false;
		}
		PaymentPK castOther = (PaymentPK)other;
		return 
			(this.customerNumber == castOther.customerNumber)
			&& this.checkNumber.equals(castOther.checkNumber);

    }