- groupBy<TSource, TKey>(src: Iterable<TSource>, keySelector: ((item: TSource) => TKey), equalityComparer?: EqualityComparer<TKey>): IEnumerable<IGrouping<TKey, TSource>>
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Parameters
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src: Iterable<TSource>
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keySelector: ((item: TSource) => TKey)
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- (item: TSource): TKey
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Returns TKey
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Optional
equalityComparer: EqualityComparer<TKey>