1 | /**
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2 | * @license
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3 | * Copyright 2017 Google LLC
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4 | *
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5 | * Licensed under the Apache License, Version 2.0 (the "License");
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6 | * you may not use this file except in compliance with the License.
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7 | * You may obtain a copy of the License at
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8 | *
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9 | * http://www.apache.org/licenses/LICENSE-2.0
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10 | *
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11 | * Unless required by applicable law or agreed to in writing, software
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12 | * distributed under the License is distributed on an "AS IS" BASIS,
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13 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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14 | * See the License for the specific language governing permissions and
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15 | * limitations under the License.
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16 | */
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17 | export declare function contains<T extends object>(obj: T, key: string): boolean;
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18 | export declare function safeGet<T extends object, K extends keyof T>(obj: T, key: K): T[K] | undefined;
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19 | export declare function isEmpty(obj: object): obj is {};
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20 | export declare function map<K extends string, V, U>(obj: {
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21 | [key in K]: V;
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22 | }, fn: (value: V, key: K, obj: {
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23 | [key in K]: V;
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24 | }) => U, contextObj?: unknown): {
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25 | [key in K]: U;
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26 | };
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27 | /**
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28 | * Deep equal two objects. Support Arrays and Objects.
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29 | */
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30 | export declare function deepEqual(a: object, b: object): boolean;
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