```// Trying to achieve this syntax: // // fun bui...

# arrow

[themishkun]

// Trying to achieve this syntax:
//
// fun buildUser(username: Option<String>, email: Option<String>, phone: Option<String>): Option<User> = 
//     builder(::User) {
//        ap(username)
//        ap(email)
//        apOpt(phone)
//     }