public static ValueTask <TSource> ElementAtOrDefaultAsync <TSource>(this IAsyncEnumerable <TSource> source, int index) => LinqEnumerable.ElementAtOrDefaultAsync(source, index);
public static ValueTask <TSource> ElementAtOrDefaultAsync <TSource>(this IAsyncEnumerable <TSource> source, int index) => LinqEnumerable.ElementAtOrDefaultAsync(source, index);