+// New CF-retained observer (this should have been using wxObjcAutoRefFromAlloc to begin with)
+wxObjcAutoRefFromAlloc<wxNSViewNotificationObserver*> s_cocoaNSViewObserver([[WX_GET_OBJC_CLASS(wxNSViewNotificationObserver) alloc] init]);
+// For compatibility with old code
+id wxCocoaNSView::sm_cocoaObserver = s_cocoaNSViewObserver;