     
     /**
      * A skin part that defines the first button.
+     *  
+     *  @langversion 3.0
+     *  @playerversion Flash 10
+     *  @playerversion AIR 1.5
+     *  @productversion Flex 4
      */
     public var firstButton:IFactory;
     

 *  The FxButtonBar control displays a set of Buttons 
 *
 *  @includeExample examples/FxButtonBarExample.mxml
 */
public class FxButtonBar extends FxListBase implements IFocusManagerComponent
{


    /**
     *  @inheritDoc
     *  
     *  @langversion 3.0
     *  @playerversion Flash 10
     *  @playerversion AIR 1.5
     *  @productversion Flex 4
     */
    override protected function partRemoved(partName:String, instance:Object):void
    {
