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1/**
2 * @license
3 * Copyright 2017 Google LLC
4 *
5 * Licensed under the Apache License, Version 2.0 (the "License");
6 * you may not use this file except in compliance with the License.
7 * You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the License for the specific language governing permissions and
15 * limitations under the License.
16 */
17/**
18 * Do a deep-copy of basic JavaScript Objects or Arrays.
19 */
20export declare function deepCopy<T>(value: T): T;
21/**
22 * Copy properties from source to target (recursively allows extension
23 * of Objects and Arrays). Scalar values in the target are over-written.
24 * If target is undefined, an object of the appropriate type will be created
25 * (and returned).
26 *
27 * We recursively copy all child properties of plain Objects in the source- so
28 * that namespace- like dictionaries are merged.
29 *
30 * Note that the target can be a function, in which case the properties in
31 * the source Object are copied onto it as static properties of the Function.
32 *
33 * Note: we don't merge __proto__ to prevent prototype pollution
34 */
35export declare function deepExtend(target: unknown, source: unknown): unknown;