title: How to put divider between few of list items in ListView.separated
body: <p>I want to put google ads after specific number of items list or in between the items list in <a href="https://api.flutter.dev/flutter/widgets/ListView/ListView.separated.html" rel="nofollow noreferrer"><code>ListView.separated</code></a>.</p>
  
  <p>I have attached an image to make it clear how I want to do it:</p>
  
  <p><a href="https://i.stack.imgur.com/mU3jp.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/mU3jp.png" alt="enter image description here"></a></p>
  
  <blockquote>
    <p>Source of the image is: <a href="https://medium.com/flutter-community/flutter-listview-and-scrollphysics-a-detailed-look-7f0912df2754" rel="nofollow noreferrer">this article</a></p>
  </blockquote>