title: How to make curved bottom appBar in Flutter?
body: <p><a href="https://i.stack.imgur.com/Frmvm.png" rel="noreferrer"><img src="https://i.stack.imgur.com/Frmvm.png" alt="custom appbar" /></a></p>
  <p>How to draw custom shape for the <code>appBar</code> in my application to look like the image?</p>