class Namaku { #firstname; #lastname; set firstName(fname) { this.#firstname = fname; } set lastName(lname) { this.#lastname = lname; } get sapaSaya() { return `Halo ${this.#firstname} ${this.#lastname} .... selamat malam!`; } } const iwan = new Namaku(); iwan.firstName = "Muhammad"; iwan.lastName = "Ridwan"; iwan.#firstname = "Beddu"; iwan.#lastname = "O'Conners"; console.log(iwan.sapaSaya);