code: function inherit(ctor, base) {
          var f = function() {};
          f.prototype = base.prototype;
  
          ctor.prototype = new f();
      }
docs: /* for reference
  function klass(props,parent) {
  var ctor = function(){
  this._construct();
  };
  ctor.prototype = props;
  if (parent) {
  ctor._proto_ = parent;
  props.__proto__ = parent.prototype;
  }
  return ctor;
  }
  
  Type some JavaScript code here.
  let animal = klass({
  _construct(){
  this.name = this.name + ",hi";
  },
  
  name: "Animal",
  eat() {         // [[HomeObject]] == animal
  alert(`${this.name} eats.`);
  }
  
  
  });
  
  
  let rabbit = klass({
  name: "Rabbit",
  _construct(){
  super._construct();
  },
  eat() {         // [[HomeObject]] == rabbit
  super.eat();
  }
  },animal);
  
  let longEar = klass({
  name: "Long Ear",
  eat() {         // [[HomeObject]] == longEar
  super.eat();
  }
  },rabbit);