title: How to extend function in another anonymous function?
body: <p>All
  I have following code:</p>
  
  <pre><code>(function($,undefined){
      function Abc(){
        function sayHello(){
            console.log("I am Abc");
        }
      }
  })(jQuery);
  </code></pre>
  
  <p>And my question is, how can I add more methods to <code>Abc</code> or overwrite <code>sayHello</code>? 
  Thanks!</p>