private static void ConvertByteArray(ReadOnlySpan <ByteArray> source, ReadOnlySpan <short> defLevels, Span <byte[]> destination, short nullLevel)
{
for (int i = 0, src = 0; i != destination.Length; ++i)
{
destination[i] = !defLevels.IsEmpty && defLevels[i] == nullLevel ? null : LogicalRead.ToByteArray(source[src++]);
}
}