export declare type AsyncMapper = <T, S>(list: T[], mapFn: (v: T, i: number) => Promise<S>) => Promise<Array<S>>;
export declare function mapAsync<T, S>(list: T[], mapFn: (v: T, i: number) => Promise<S>): Promise<Array<S>>;
export declare function mapAsyncSerial<T, S>(list: T[], mapFn: (v: T, i: number) => Promise<S>): Promise<Array<S>>;
export declare function reduceAsyncSequence<T, S>(list: T[], reduceFn: (acc: any, v: T, i: number) => Promise<S>, initialValue: S): Promise<S>;