class Person { protected name: string; protected constructor(theName: string) { this.name = theName; } } // Employee can extend Person class Employee extends Person { private department: string; constructor(name: string, department: string) { super(name); this.department = department; } public getElevatorPitch() { return `Hello, my name is ${this.name} and I work in ${this.department}.`; } } let howard = new Employee("Howard", "Sales"); let john = new Person("John"); // Error: The 'Person' constructor is protected