title: What to use since Marionette Application Regions are deprecated
body: <p>I am confused by the Marionette (2.3.0) documentation from the link below that says the Application Regions feature is deprecated. A Layout View should be used instead. Does that mean I should not use <code>MyApp.addRegions()</code> any more? Then how should I add my Layout View to my application?</p>
  
  <p><a href="http://marionettejs.com/docs/marionette.application.html#application-regions" rel="noreferrer">http://marionettejs.com/docs/marionette.application.html#application-regions</a></p>
  
  <blockquote>
    <p>Application Regions</p>
    
    <p>Warning: deprecated This feature is deprecated. Instead of using the
    Application as the root of your view tree, you should use a Layout
    View. To scope your Layout View to the entire document, you could set
    its el to 'body'. This might look something like the following: </p>
    
    <p>var RootView = Marionette.LayoutView.extend({ el: 'body' });</p>
  </blockquote>