 public class CheckBox extends ToggleButtonBase
 {
     include "../core/Version.as";
+    
+    //--------------------------------------------------------------------------
+    //
+    //  Class mixins
+    //
+    //--------------------------------------------------------------------------
+
+    /**
+     *  @private
+     *  Placeholder for mixin by CheckBoxAccImpl.
+     */
+    mx_internal static var createAccessibilityImplementation:Function;
+
 
     //--------------------------------------------------------------------------
     //

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

[IconFile("CheckBox.png")]

/**
 *  The CheckBox component consists of an optional label and a small box


import flash.events.Event;
import flash.events.MouseEvent;
import mx.core.mx_internal;

import spark.components.supportClasses.ToggleButtonBase;

use namespace mx_internal;

/**
 *  @copy spark.components.supportClasses.GroupBase#style:symbolColor
