title: How to increase icon size without getting an overflow error?
body: <p>I need to display 2 icons in the app bar, one at the left and one at the right.</p>
  
  <p><strong>My code</strong></p>
  
  <pre><code>Scaffold(
    appBar: AppBar(
      leading: FlatButton.icon(
          onPressed: () {},
          icon: Icon(Icons.info,size: 20,color: Colors.white,),
      bottom:TabBar(...),
      actions:Widget&lt;&gt;[...],
  </code></pre>
  
  <p>I'm able to do so, however the size of the icon is too small as you can see below</p>
  
  <p><a href="https://i.stack.imgur.com/dDksc.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/dDksc.jpg" alt="enter image description here"></a></p>
  
  <p>If I increase the icon size by more than 20, i get an <code>overflow</code> error.</p>
  
  <p>I've also tried wrapping the <code>FlatButton</code> widget with a <code>Wrap</code> widget but I still get the same result.</p>
  
  <p>How can I increase the size of the icon?</p>