title: Uglify JS - compressing unused variables
body: <p>Uglify has a "compression" option that can remove unused variables...</p>
  
  <p>However, if I stored some functions in an object like this....</p>
  
  <pre><code>helpers = {
      doSomething: function () { ... },
      doSomethingElese: function () { ... }
  }
  </code></pre>
  
  <p>... is there a way to remove helpers.doSomething() if it's never accessed?</p>
  
  <p>Guess I want to give the compressor permission to change my object.</p>
  
  <p>Any ideas if it's possible?  Or any other tools that can help?</p>