title: Backbone Marionette: Add to region
body: <p>Instead of using region.show(view), I would like to add multiple views to a region without destroying the view already present in the region. I have tried using preventDestroy: true, but it isnt working out. The region only shows the last "application".</p>
  
  <pre><code>  var fetchingApplications = App.request('application:entities');
  
    $.when(fetchingApplications).done(function(applications) {
      console.log(applications);
  
      applications.each(function(application) {
  
        var applicationView = new List.Application({
          model: application
        });
  
        App.layout.mainRegion.show(applicationView, { preventDestroy: true });
  
  
      });
  </code></pre>
  
  <p>I know the example look weird, because I could merely use a CollectionView. However, using a CollectionView is not what I want to do.</p>