class LocationModel { final double? latitude; final double? longitude; final String? address; LocationModel({this.latitude, this.longitude, this.address}); factory LocationModel.fromJson(Map json) => LocationModel( latitude: json["latitude"] as double?, longitude: json["longitude"] as double?, address: json["address"] as String?, ); Map toJson() => { "latitude": latitude, "longitude": longitude, "address": address, }; }