I tried this
{$main_pair = $oi.product_id|fn_get_image_pairs:'product':'M':true:true}
{include file="common/image.tpl" image=$main_pair.icon|default:$main_pair.detailed image_id=$main_pair.image_id image_width=50 href="products.update?product_id=`$product.product_id`"|fn_url:'A'}
but it didn't work