import type { mapFn } from './_types';
/**
 * Finds largest value.
 * @param x an array
 * @param fn map function (v, i, x)
 * @param ths this argument
 */
declare function maxOn<T, U>(x: Iterable<T>, fn?: mapFn<T, U>, ths?: object): T;
export default maxOn;
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