title: Flutter FloatingActionButton and IconButton
body: <p>How can I create a <code>FloatingActionButton</code> like in the image?</p>
  
  <p>I tried using <code>FloatingActionButton</code>, but it looks like a whole button with a circle.</p>
  
  <p><img src="https://i.stack.imgur.com/n1bv3.png" alt="Sample Image"></p>
  
  <p>I need something like an <code>IconButton</code> as shown in the image.</p>