text: /**
   * Copyright 2020 The AMP HTML Authors. All Rights Reserved.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS-IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  import {Services} from '#service';
  import {installWebAnimations} from 'web-animations-js/web-animations.install';
  
  /**
   * Tries to find an existing amp-lightbox-gallery, if there is none, it adds a
   * default one.
   * @param {!../../../src/service/ampdoc-impl.AmpDoc} ampdoc
   * @return {!Promise<undefined>}
   */
  export function install(ampdoc) {
    installWebAnimations(ampdoc.win);
  }
  Services.extensionsFor(AMP.win).addDocFactory(install);
  