/**
 * Copyright 2017 Google Inc.
 *
 * 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 Contains methods for working with objects.
 */
export declare function contains(obj: Object, prop: string): boolean;
export declare function forEach<T>(obj: {
    [key: string]: T;
}, f: (p1: string, p2: T) => void): void;
export declare function clone<T>(obj?: {
    [key: string]: any;
} | null): T;