import { AsyncIterableX } from '../../asynciterable/asynciterablex';
export declare function maxProto(this: AsyncIterableX<number>, selector?: (x: number) => number): Promise<number>;
export declare function maxProto<T>(this: AsyncIterableX<T>, selector: (x: T) => number): Promise<number>;
declare module '../../asynciterable/asynciterablex' {
    interface AsyncIterableX<T> {
        max: typeof maxProto;
    }
}