     implements IFocusManagerComponent, IIMESupport, ITextSupport, IViewport
 {
     include "../core/Version.as";
-        
+    
+    //--------------------------------------------------------------------------
+    //
+    //  Class mixins
+    //
+    //--------------------------------------------------------------------------
+
+    /**
+     *  @private
+     *  Placeholder for mixin by RichEditableTextAccImpl.
+     */
+    mx_internal static var createAccessibilityImplementation:Function;
+
     //--------------------------------------------------------------------------
     //
     //  Class initialization

//  Other metadata
//--------------------------------------

[DefaultProperty("content")]
[IconFile("RichEditableText.png")]
[DefaultTriggerEvent("change")]

    //  Overridden Methods: UIComponent
    //
    //--------------------------------------------------------------------------

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

    /**
     *  @private
