title: How to change speed of a hero animation in flutter
body: <p>I have made simple hero animation following instructions from <a href="https://flutter.io/docs/development/ui/animations/hero-animations" rel="noreferrer">Flutter's website</a></p>
  
  <p>It works as described in the instructions but in my case, I would like it to animate much more slowly from the first to the second screen. do anyone know how to change the speed of this animation?</p>