class AddressModel{ int? id; String? name; String? mobile; String? province; String? city; String? district; String? address; int? isDefault; AddressModel({ this.id, this.name, this.mobile, this.province, this.city, this.district, this.address, this.isDefault, }); factory AddressModel.empty() { return AddressModel(id: null,name: '',mobile: '',province: '',city: '',district: '',address: '',isDefault: 0); } }