title: flutter ImageIcon change size
body: <p>I have this <code>ImageIcon</code>:</p>
  <pre><code>            Container(
              color: Colors.yellow,
              padding: const EdgeInsets.all(0.0),
              child: ImageIcon(AssetImage(&quot;assets/images/group.png&quot;), size: 50,))
  </code></pre>
  <p>I get this:
  <a href="https://i.stack.imgur.com/uCdD0.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/uCdD0.png" alt="enter image description here" /></a></p>
  <p>How can I make the icon take all the space available?</p>