import { type ObjectOrArray } from './common.js';
/**
 * tiny non-mutating alternative to dot-prop or lodash.set that only
 * works with JSON-compatible objects
 *
 * accepts a generic to optionally set the output type, otherwise assumes
 * your mutation will not alter the object's type
 */
export declare function set<O = undefined, T extends ObjectOrArray = ObjectOrArray>(root: T, path: string | number | (string | number)[], newValue: unknown): (O extends undefined ? T : O);