     }
     
     /**
-     *  Helper method used to determine if we can safely transition our
-     *  control bar content independently of our views.
-     * 
-     *  <p> We will not be able to transition our action bar independently if 
-     *  our containing navigator is a TabbedViewNavigator and its tabBar's 
-     *  visibility changes between views, if the value of the overlayControls
-     *  flag changes between views, or if the size/visibility of the action 
-     *  bar changes between views.</p>
-     * 
-     *  @return false if we determine controls bars between views are 
+     *  Determine if Flex can perform a transition on 
+     *  action bar or tab bar content independently of the views.
+     * 
+     *  <p>Flex cannot perform a transition on the control bars independently:</p>
+     *  <ul>
+     *      <li>If the containing view navigator is a TabbedViewNavigator 
+     *        and its tab bar's visibility changes between views.</li>
+     *      <li>If the value of the view navigator's <code>overlayControls</code>
+     *        property changes between views.</li>
+     *      <li>If the size or visibility of the action bar changes 
+     *        between views.</li>
+     *  </ul>
+     * 
+     *  @return <code>false</code> if Flex determines controls bars between views are 
      *  incompatible in some way.
      * 
      *  @langversion 3.0

    private var _endView:View;
    
    /**
     *  Reference to the view that the navigator is transitioning
     *  to, set by the owning ViewNavigator itself.  
     *  This property can be null.
     *
     *  @default null

     *  transition animation.
     * 
     *  @default Sine(.5);
     *
     *  @see spark.effects.easing
     * 
     *  @langversion 3.0
     *  @playerversion AIR 2.5
