     }
 
     /**
+     *  @private
      *  Set this scrollbar's maximum to the viewport's contentHeight 
      *  less the viewport height. 
      *

     *  @playerversion AIR 1.5
     *  @productversion Flex 4
     */
    override protected function viewportVerticalScrollPositionChangeHandler(event:PropertyChangeEvent):void
    {
        if (viewport)
            value = viewport.verticalScrollPosition;
    }
    
    /**
     *  Set this scrollbar's maximum to the viewport's contentHeight 
     *  less the viewport height and its pageSize to the viewport's height. 
     *  


package spark.components
{
import mx.core.mx_internal;
import mx.events.PropertyChangeEvent;
import mx.events.ResizeEvent;

import spark.components.supportClasses.ScrollBar;
import spark.core.IViewport;
import spark.core.NavigationUnit;

use namespace mx_internal;

//--------------------------------------
//  Other metadata
