public static ValueTask <bool> SequenceEqualAsync <TSource>(this IAsyncEnumerable <TSource> first, IAsyncEnumerable <TSource> second) =>
 LinqEnumerable.SequenceEqualAsync(first, second);
 public static ValueTask <bool> SequenceEqualAsync <TSource>(this IAsyncEnumerable <TSource> first, IAsyncEnumerable <TSource> second, IEqualityComparer <TSource> comparer) =>
 LinqEnumerable.SequenceEqualAsync(first, second, comparer);