title: How do I add content to the Cast Dialog?
body: <p>I am creating a data-centric application and allow the user to cast information to the Chromecast.</p>
  
  <p>I am using the CCL from Github to aide in implementation (e.g. restoring sessions)</p>
  
  <p>But how do I add content to the dialog that is shown when you click the cast button?</p>
  
  <p>Currently, by default, it just shows the CC device name, a volume slider and the disconnect button.</p>
  
  <p>I'd like to show what type of information is currently being shown (in place of what video or music might be playing, if you had that type of application)</p>