title: How does one access a grandparent this in JS?
body: <p>How could I access a grandparent "this"?</p>
  
  <pre><code>function F(){}
  F.prototype.foo = 5;
  F.prototype.getFoo = function(){ return this.foo; };
  F.prototype.container.getFoo = function(){
     /* What goes here to return 5? */
  };
  </code></pre>