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

    
    /**
     * A skin part that defines the first button.
     */
    public var firstButton:IFactory;
    

 *  The FxButtonBar control displays a set of Buttons 
 *
 *  @includeExample examples/FxButtonBarExample.mxml
 *  
 *  @langversion 3.0
 *  @playerversion Flash 10
 *  @playerversion AIR 1.5
 *  @productversion Flex 4
 */
public class FxButtonBar extends FxListBase implements IFocusManagerComponent
{
