toJson method
Implementation
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = <String, dynamic>{};
data['id_billing'] = idBilling;
data['billing_data'] = billingData;
data['payment_type_code'] = paymentTypeCode;
data['flag'] = flag;
data['generated_date'] = generatedDate;
data['payment_date'] = paymentDate;
data['client_refnum'] = clientRefnum;
return data;
}