toJson method
Implementation
Map<String, dynamic> toJson() {
final Map<String, dynamic> data = <String, dynamic>{};
data['first_name'] = firstName;
data['last_name'] = lastName;
data['company'] = company;
data['address_1'] = address1;
data['address_2'] = address2;
data['city'] = city;
data['state'] = state;
data['postcode'] = postcode;
data['country'] = country;
return data;
}