// todo test
           // todo move to ClassUtils?
          public function @ax-lib-flex-animation-code-10-org-as3lib-utils-isPrimitive(instance:*):Boolean {
                  if (!isNaN(instance)) return true;
                  if (instance is String) return true;
                  if (instance is Boolean) return true;
                  //AE if (instance is void) return true;
                  return false;
          }
  }