'use strict';

function Person(name) {
    if (!name) {
        throw new Error("Name not set");
    }
    this.name = name;
    //this.getName = () => `this.getName: ${this.name}`;

}
Person.prototype.getName = function (){ return `proto.getName ${this.name}`; }

var person = new Person("Kala");
console.log(Object.keys(person));
console.log(Object.keys(person.__proto__));
console.log(person.getName());