import type { IAsyncEnumerable, IEqualityComparer, IGrouping, SelectorKeyType } from "../../types";
type GroupByWithSelFunc = {
    <TSource, TKey extends SelectorKeyType, TElement>(source: AsyncIterable<TSource>, keySelector: (x: TSource) => TKey, elementSelector: (x: TSource) => TElement): IAsyncEnumerable<IGrouping<TKey, TElement>>;
    <TSource, TKey, TElement>(source: AsyncIterable<TSource>, keySelector: ((x: TSource) => TKey), elementSelector: (x: TSource) => TElement, comparer: IEqualityComparer<TKey>): IAsyncEnumerable<IGrouping<TKey, TElement>>;
};
export declare const groupByWithSel: GroupByWithSelFunc;
export {};