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/**

* Copyright 2015 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.

*/

/**

* @fileoverview Factory for ./service/cid-impl.js

*/

import {

getElementService,

getElementServiceIfAvailable,

} from './custom-element';

/**

* @param {!Window} window

* @return {!Promise<!Cid>}

*/

export function cidFor(window) {

return getElementService(window, 'cid', 'amp-analytics');

};

/**

* Returns a promise for the CID service or a promise for null if the service

* is not available on the current page.

* @param {!Window} window

* @return {!Promise<?Cid>}

*/

export function cidForOrNull(window) {

return getElementServiceIfAvailable(window, 'cid', 'amp-analytics');

};