abstract class AbstractEngineer { protected coding(): void {} } class ConcreteEngineer extends AbstractEngineer { private name: string; private designation: string; private location: string; constructor(name: string, designation: string, location: string) { super(); this.name = name; this.designation = designation; this.location = location; } public me(): void { console.log(`I'm ${this.name}, a ${this.designation} who's been living in ${this.location}.`) } } const engineer = new ConcreteEngineer('Maxime Golfier', 'Software Engineer', 'Paris, France'); engineer.me();