toJson method
Implementation
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = <String, dynamic>{};
data['cardHolderName'] = cardHolderName;
data['number'] = number;
data['expiryMonth'] = expiryMonth;
data['expiryYear'] = expiryYear;
data['securityCode'] = securityCode;
return data;
}