         if (value == _variableColumnWidth) return;
         
         _variableColumnWidth = value;
- 		var layoutTarget:GroupBase = target;
-        if (layoutTarget != null) {
-    		layoutTarget.invalidateSize();
-        	layoutTarget.invalidateDisplayList();
-        }
+        invalidateTargetSizeAndDisplayList();
     }
     
     //----------------------------------

            updateDisplayListVirtual();
        else
            updateDisplayListReal();
    }     

}
}


     *  Note that the column may only be partially in view.
     * 
     *  @see firstIndexInView
     *  @see fractionOfElementInView
     *  
     *  @langversion 3.0
     *  @playerversion Flash 10
