     @chainable
   ###
   _subArraysDidChange: Ember.observer ->
-    Ember.A(get(@, 'needs')).addObjects(Ember.A(get(@, 'subArrays')))
+    get(@, 'needs').addObjects(Ember.A(get(@, 'subArrays')))
     @
   , 'subArrays', 'subArrays.@each'


    flatten arrangedContent

  ###
    @private


        children: controller
      })
    ))
  .property('content', 'sortProperties.@each', 'needs.@each', 'subArrays.@each')

  ###
    Assembles array of objects contained in this mixed array controller and all
