toJson method
Implementation
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = <String, dynamic>{};
data['amount'] = amount;
data['txnRef'] = txnRef;
data['mobileNumber'] = mobileNumber;
data['zainboxCode'] = zainboxCode;
data['emailAddress'] = emailAddress;
data['callBackUrl'] = callBackUrl;
return data;
}