title: Flutter DraggableScrollableSheet - how to expand/collapse programmatically
body: <p>I'm wondering if anyone knows/found a way to make Flutters' DraggableScrollableSheet expand/collapse programmatically. I'm using Flutters latest build from their Dev channel which allows me to wrap it in a </p>
  
  <pre><code>NotificationListener&lt;DraggableScrollableNotification&gt;
  </code></pre>
  
  <p>which I can then listen to the extend of how far the sheets is expanded / collapsed. However, I'm not clear on how I would be able to collapse an expanded sheet or vice versa.</p>
  
  <p>Seems in the widget src file there's a</p>
  
  <pre><code>DraggableScrollableActuator
  </code></pre>
  
  <p>that exposes a static .reset but I don't know/or think of a way to make that work. </p>