public SUNATRetentionDocumentReference()
{
ID = new PartyIdentificationID();
TotalInvoiceAmount = new PayableAmount();
Payment = new Payment();
SUNATRetentionInformation = new SUNATRetentionInformation();
}
public BillingPayment()
{
PaidAmount = new PayableAmount();
Id = new PartyIdentificationID();
}
public PartyIdentification()
{
ID = new PartyIdentificationID();
}