title: How to create multiline SnackBar in Flutter?
body: <p>How to create multiline SnackBar in Flutter? Is there any easy way to show action button below the content?</p>
  <p>The <a href="https://material.io/components/snackbars#anatomy" rel="nofollow noreferrer">Material specs</a> allows to use SnackBars with button below the content:</p>
  <p><a href="https://i.stack.imgur.com/CdHko.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/CdHko.jpg" alt="enter image description here" /></a></p>