import type { IAsyncEnumerable } from "../../types";
type SelectFunc = {
    <TSource, TResult>(source: AsyncIterable<TSource>, selector: (x: TSource, index: number) => TResult): IAsyncEnumerable<TResult>;
    <TSource, TKey extends keyof TSource>(source: AsyncIterable<TSource>, key: TKey): IAsyncEnumerable<TSource[TKey]>;
};
export declare const select: SelectFunc;
export {};