title: Marionette `close()` or `empty()`
body: <p>In my app I am adding views to <code>content</code> region and <code>header,footer</code>. before I add a view, I am trying to find if there is a controller exist. if so i am trying to close those regions before I add another like this:</p>
  
  <pre><code>if(socialApp.Controller) {
   socialApp.Controller.layout.header.close();
   socialApp.Controller.layout.content.close();
   socialApp.Controller.layout.footer.close();
  }
  </code></pre>
  
  <p>But I am getting error.</p>
  
  <p>Instead of close i used the <code>empty()</code> method is works fine. </p>
  
  <pre><code>if(socialApp.Controller) {
       socialApp.Controller.layout.header.empty();
       socialApp.Controller.layout.content.empty();
       socialApp.Controller.layout.footer.empty();
      }
  </code></pre>
  
  <p>what I do is correct? any one confirm me please?
  Note : Do I need to <code>close</code> the controller / views as well..!?
  I am using <code>Backbone.Marionette</code> <code>v2.1.0</code>.
  Thanks in advance.</p>