public static UniTask <Dictionary <TKey, TSource> > ToDictionaryAwaitAsync <TSource, TKey>(this IUniTaskAsyncEnumerable <TSource> source, Func <TSource, UniTask <TKey> > keySelector, CancellationToken cancellationToken = default) { Error.ThrowArgumentNullException(source, nameof(source)); Error.ThrowArgumentNullException(keySelector, nameof(keySelector)); return(ToDictionary.ToDictionaryAwaitAsync(source, keySelector, EqualityComparer <TKey> .Default, cancellationToken)); }