/**
 * @license
 * Copyright Google LLC 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
 */
/**
 * Extends an object with the *enumerable* and *own* properties of one or more source objects,
 * similar to Object.assign.
 *
 * @param dest The object which will have properties copied to it.
 * @param sources The source objects from which properties will be copied.
 */
export declare function extendObject(dest: any, ...sources: any[]): any;