     *  @playerversion AIR 1.5
     *  @productversion Flex 4
     */
-    protected function viewportResizeHandler(event:ResizeEvent):void
+    mx_internal function viewportResizeHandler(event:ResizeEvent):void
     {
     }
     
    /**
+    *  @private
     *  Called when the viewport's <code>contentWidth</code> value changes. Does nothing by default.
     *  
     *  @langversion 3.0

import spark.effects.easing.IEaser;
import spark.effects.easing.Linear;
import spark.effects.easing.Sine;

/**
 *  @copy spark.components.supportClasses.GroupBase#symbolColor

    *  @playerversion AIR 1.5
    *  @productversion Flex 4
    */
    mx_internal function viewportContentWidthChangeHandler(event:PropertyChangeEvent):void
    {
    }
    
    /**
     *  @private 
     *  Called when the viewport's <code>contentHeight</code> value changes. Does nothing by default.
     *  
     *  @langversion 3.0
