title: How to set focus to a materialUI TextField?
body: <p>How can I set the focus on a <code>material-ui TextField</code> component?</p>
  
  <pre><code>componentDidMount() {
      ReactDom.findDomNode(this.refs.myControl).focus()
  }
  </code></pre>
  
  <p>I have tried above code, but it does not work :(</p>