title: React 0.13 this.getDOMNode() equivalent to React.findDOMNode()
body: <p>This works perfectly fine in React version 0.12:</p>
  
  <pre><code>componentDidMount: function () {
      var dom = this.getDOMNode();
  }
  </code></pre>
  
  <p>The variable <code>dom</code> gets the actual DOM node for the rendered component.  However, converting this to React 0.13 does not work as expected:</p>
  
  <pre><code>componentDidMount: function () {
      var dom = React.findDOMNode();
      // dom is undefined
  }
  </code></pre>
  
  <p>I tried <code>React.findDOMNode(this)</code> which does not work either.  Basically I'm just trying to fetch the top-level dom node rendered by the render function without using a ref.  Is this possible?</p>