1 | import { OperatorAsyncFunction } from '../../interfaces';
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2 | import { GroupedAsyncIterable } from '../groupby';
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3 | export declare function groupBy<TSource, TKey>(keySelector: (value: TSource) => TKey | Promise<TKey>): OperatorAsyncFunction<TSource, GroupedAsyncIterable<TKey, TSource>>;
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4 | export declare function groupBy<TSource, TKey, TValue>(keySelector: (value: TSource) => TKey | Promise<TKey>, elementSelector?: (value: TSource) => TValue | Promise<TValue>): OperatorAsyncFunction<TSource, GroupedAsyncIterable<TKey, TValue>>;
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5 | export declare function groupBy<TSource, TKey, TValue, TResult>(keySelector: (value: TSource) => TKey | Promise<TKey>, elementSelector?: (value: TSource) => TValue | Promise<TValue>, resultSelector?: (key: TKey, values: Iterable<TValue>) => TResult | Promise<TResult>): OperatorAsyncFunction<TSource, TResult>;
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