text: import Cattle from 'ui/utils/cattle';
  
  export default Cattle.CollectionController.extend({
    itemController: 'volume',
    nonRootVolumes: function() {
      return this.get('arrangedContent').filter(function(volume) {
        return !volume.get('instanceId');
      });
    }.property('arrangedContent.[]')
    
  
  });
  