title: React manually fire mouseover event
body: <p>Is there anyway to trigger React's mouseover and mouseenter event? It's possible to fire:</p>
  
  <pre><code>ReactDOM.findDOMNode(someNode).focus();
  ReactDOM.findDOMNode(someNode).click();
  </code></pre>
  
  <p>Is there a similar way to fire mouseenter? I need to do a complicated React event with a 3rd party library.</p>