title: Create a button with rounded border
body: <p>How would you make a <code>FlatButton</code> into a button with a rounded border? I have the rounded border shape using <code>RoundedRectangleBorder</code> but somehow need to color the border.</p>
  
  <pre><code>new FlatButton(
    child: new Text("Button text),
    onPressed: null,
    shape: new RoundedRectangleBorder(borderRadius: new BorderRadius.circular(30.0))
  )
  </code></pre>
  
  <p>Example of how button with rounded button would look :  <a href="https://i.stack.imgur.com/GdvrF.png" rel="noreferrer"><img src="https://i.stack.imgur.com/GdvrF.png" alt="image"></a></p>