title: ScrollController not attached to any scroll views
body: <p>I'm using CustomScrollView, and providing it with a controller.
  ScrollController works, I even added a listener to it and print out the position of the scroll view.</p>
  
  <pre><code>CustomScrollView(
      controller: _scrollController,
  </code></pre>
  
  <p>Now, all i'm trying to do is jump to position 50.0 inside initState() function. </p>
  
  <pre><code>_scrollController.jumpTo(50.0);
  </code></pre>
  
  <p>But, i get the error </p>
  
  <blockquote>
    <p>scrollController not attached to any scroll views</p>
  </blockquote>