     
     //--------------------------------------------------------------------------
     //
+    //  Class mixins
+    //
+    //--------------------------------------------------------------------------
+
+    /**
+     *  @private
+     *  Placeholder for mixin by ButtonBarAccImpl.
+     */
+    mx_internal static var createAccessibilityImplementation:Function;
+    //--------------------------------------------------------------------------
+    //
     //  Constructor
     //
     //--------------------------------------------------------------------------


        super.setCurrentCaretIndex(value);
    }

    //--------------------------------------------------------------------------
    //

use namespace mx_internal;  //ListBase and List share selection properties that are mx_internal

[IconFile("ButtonBar.png")]

[AccessibilityClass(implementation="spark.accessibility.ButtonBarAccImpl")]

/**
 *  The ButtonBar control defines a horizontal group of 
