/*!
 * Copyright (c) Microsoft Corporation and contributors. All rights reserved.
 * Licensed under the MIT License.
 */
/**
 * Rough polyfill for Array.findLastIndex until we target ES2023 or greater.
 */
export declare const findLastIndex: <T>(array: T[], callbackFn: (value: T) => boolean) => number;
/**
 * Rough polyfill for Array.findLast until we target ES2023 or greater.
 */
export declare const findLast: <T>(array: T[], callbackFn: (value: T) => boolean) => T | undefined;
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