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- /**
- * @license
- * Copyright Google Inc. All Rights Reserved.
- *
- * Use of this source code is governed by an MIT-style license that can be
- * found in the LICENSE file at https://angular.io/license
- *
- * This file is a port of shadowCSS from webcomponents.js to TypeScript.
- * https://github.com/webcomponents/webcomponentsjs/blob/4efecd7e0e/src/ShadowCSS/ShadowCSS.js
- * https://github.com/angular/angular/blob/master/packages/compiler/src/shadow_css.ts
- */
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