title: Flutter Modal Sheet
body: <p>I have seen and tried the '<em>showModalBottomSheet</em>' widget in flutter, and thought whether there was a widget like 'top sheet modal'. like whatsapp when a message comes in. as below,</p>
  
  <p>Thanks in advance.</p>
  
  <p><a href="https://i.stack.imgur.com/Jo5Ul.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/Jo5Ul.jpg" alt="enter image description here"></a></p>