public void GetMultiRowSpan(int width, int height, int min, int max)
{
using (Buffer2D <int> buffer = Configuration.Default.MemoryAllocator.Allocate2D <int>(width, height))
{
var rows = new RowInterval(min, max);
Span <int> span = buffer.GetMultiRowSpan(rows);
ref int expected0 = ref buffer.Span[min * width];
int expectedLength = (max - min) * width;
ref int actual0 = ref span[0];