import type { CompareFn, KeyFn } from '../types/functions/mod';
import { Curry2 } from '../lib/utils/mod';
export interface MaxByKey {
    <T, K>(keyFn: KeyFn<T, K>, cmpFn: CompareFn<K>, iter: AsyncIterable<T>): Promise<T | undefined>;
    <T, K>(keyFn: KeyFn<T, K>, cmpFn: CompareFn<K>): (iter: AsyncIterable<T>) => Promise<T | undefined>;
    <T, K>(keyFn: KeyFn<T, K>): Curry2<CompareFn<K>, AsyncIterable<T>, Promise<T | undefined>>;
}
export declare const maxByKey: MaxByKey;
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