toMap method
Implementation
Map<String, dynamic> toMap() => {
"slip_url": slipURL == null ? null : slipURL,
"slip_image": slipImage == null ? null : slipImage,
"payment_date": paymentDate == null ? null : paymentDate,
"payment_account": paymentAccount == null ? null : paymentAccount,
"agent_reference": reference == null ? null : reference,
};