title: localStorage.prototype is null
body: <p>I'm trying to extend localStorage w/ the following...</p>
  
  <pre><code>localStorage.prototype.setItem2 = function(key,value) {
      localStorage.setItem(key,value);
  }
  </code></pre>
  
  <p>I'm getting "localStorage.prototype is null."  Am I doing this correctly?  Thanks!</p>