toJson method
Implementation
Map<String, dynamic> toJson() => {
"first_name": firstName ?? firstName,
"last_name": lastName ?? lastName,
"building": building ?? building,
"floor": floor ?? floor,
"apartment": apartment ?? apartment,
"city": city ?? city,
"state": state ?? state,
"country": country ?? country,
"email": email ?? email,
"phone_number": phoneNumber ?? phoneNumber,
"postal_code": postalCode ?? postalCode,
};