constructer(name, type) { this.#name = name; this.#type = type; } speak() { console.log(`${this.#name} is ${this.#type} Engneer.`) } } const kaneko = new Engineer('Kaneko', 'Front End'); kaneko.speak(); / / Kaneko is Front End Engineer. kaneko.#type = 'Unity'; / / SyntaxError kaneko.speak(); / / Kaneko is Front End Engineer.