      *  @playerversion AIR 1.5
      *  @productversion Flex 4
      */
-    override protected function viewportContentWidthChangeHandler(event:PropertyChangeEvent):void
+    override mx_internal function viewportContentWidthChangeHandler(event:PropertyChangeEvent):void
     {
         if (viewport)
             maximum = viewport.contentWidth - viewport.width;

     *  @playerversion AIR 1.5
     *  @productversion Flex 4
     */
    override protected function viewportResizeHandler(event:ResizeEvent):void
    {
        if (viewport)
        {


package spark.components
{
import mx.core.mx_internal;
import mx.events.PropertyChangeEvent;
import mx.events.ResizeEvent;
    
import spark.components.supportClasses.ScrollBar;
import spark.core.NavigationUnit;
import spark.core.IViewport;

use namespace mx_internal;

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