toJson method
Converts the InvoiceTotal instance into a JSON map.
This method generates a map representation of the invoice total, which can be used for serializing the object into JSON format for APIs or storage. Example:
{
"subtotal": 100.00,
"vatAmount": 15.00,
"grandTotal": 115.00
}
Implementation
Map<String, dynamic> toJson() => {
"subtotal": subtotal,
"vatAmount": vatAmount,
"grandTotal": grandTotal,
};