title: Custom BouncingScroll Effect in flutter
body: <h3>Project</h3>
  <p>Hi, I was playing around with bouncing scroll physics in flutter, trying to achieve a specific behaviour.</p>
  <p>Here is a simple mockup</p>
  <p><a href="https://i.stack.imgur.com/i5BAP.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/i5BAP.png" alt="enter image description here" /></a></p>
  <p>BouncingScrollPhysics in flutter create this overscroll effect on top of a listview adding some space in relation to user scroll.</p>
  <h3>Question</h3>
  <p>Is it possible to extend this behaviour also to the spacing between list view elements? I noticed this kind of behaviour in some ios apps lately and i wanted to understand if this is achievable in flutter.</p>
  <p>Hope someone can help with this, it's really cool effect.</p>
  <p>Thanks</p>