     //
     //--------------------------------------------------------------------------
 
-    /**
-     *  @private
-     */
-    override protected function initializeAccessibility():void
-    {
-        if (RadioButton.createAccessibilityImplementation != null)
-            RadioButton.createAccessibilityImplementation(this);
-    }
-
-
     //----------------------------------
     //  enabled
     //----------------------------------

        super.commitProperties();
    }

    //--------------------------------------------------------------------------
    //
    //  Methods
    //
    //--------------------------------------------------------------------------
    
    /**
     *  @private
     *  automaticRadioButtonGroups is shared with halo radio button groups.
     *  Spark radio button groups are prefixed with _fx to differentiate the
     *  Halo groups which are stored in the same table.
     */
    private function get autoGroupIndex():String
    {
        return "_spark_" + groupName;
    }

    /**
     *  @private
     *  Create radio button group if it does not exist

            addToGroup();

        var g:RadioButtonGroup = group;

        if (g.selection != this)
            g.setSelection(this);
    }

    //--------------------------------------------------------------------------
    //
    //  Overridden event handlers: UIComponent
