/**
 * @license
 * Copyright (c) 2016 The Polymer Project Authors. All rights reserved.
 * This code may only be used under the BSD style license found at
 * http://polymer.github.io/LICENSE.txt The complete set of authors may be found
 * at http://polymer.github.io/AUTHORS.txt The complete set of contributors may
 * be found at http://polymer.github.io/CONTRIBUTORS.txt Code distributed by
 * Google as part of the polymer project is also subject to an additional IP
 * rights grant found at http://polymer.github.io/PATENTS.txt
 */
/**
 * Represents the 'already constructed marker' used in custom
 * element construction stacks.
 *
 * https://html.spec.whatwg.org/#concept-already-constructed-marker
 */
declare const alreadyConstructedMarker: {
    _alreadyConstructedMarker: never;
};
export default alreadyConstructedMarker;
export declare type AlreadyConstructedMarkerType = typeof alreadyConstructedMarker;