import { EqualityComparer, IEnumerable, IEnumerableFactory, IGrouping } from '../../types';
export declare function applyGroupBy<TSource, TKey>(factory: IEnumerableFactory, src: Iterable<TSource>, keySelector: (item: TSource) => TKey, equalityComparer?: EqualityComparer<TKey>): IEnumerable<IGrouping<TKey, TSource>>;
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