private static ReadOnlySpan <byte> CreateSpan(Utf8String text, int start, int length) => text.GetSpan().Slice(start, length);
private static ReadOnlySpan <byte> CreateSpan(Utf8String text) => text.GetSpan();
private static ReadOnlySpan <byte> CreateSpan(Utf8String text, int start, int length) => text.GetSpan().Slice(start, length);
private static ReadOnlySpan <byte> CreateSpan(Utf8String text) => text.GetSpan();