func main(){
let user = User(id: "1234", name: "Khrisna", address: Address(id: "123", location: "Bandung"))
}
class User {
private let _id: String
private let _name: String
private let _address: Address
init(id: String, name: String, address: Address) {
_id = id
_name = name
_address = address
}
}
class Address {
private let _id: String
private let _location: String
init(id: String, location: String) {
_id = id
_location = location
}
}