toJson method
Implementation
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = <String, dynamic>{};
data['id'] = id;
data['code'] = code;
data['discount'] = discount;
data['discount_tax'] = discountTax;
data['meta_data'] = metaData.map((v) => v.toJson()).toList();
return data;
}