def build_line_items(xml, line_items)
      xml.lineItems do
        line_items.each do |line_item|
          xml.item do
            xml.quantity(1)
            xml.weight(line_item.kilograms)
            xml.length(line_item.cm(:length).to_s)
            xml.width(line_item.cm(:width).to_s)
            xml.height(line_item.cm(:height).to_s)
            xml.description(line_item.options[:description] || ' ')
            xml.readyToShip(line_item.options[:ready_to_ship] || nil)
            # By setting the 'readyToShip' tag to true, Sell Online will not pack this item in the boxes defined in the merchant profile.
          end
        end
      end
    end
def build_line_items(xml, line_items)
      xml.lineItems do
        line_items.each do |line_item|
          xml.item do
            xml.quantity(1)
            xml.weight(line_item.kilograms)
            xml.length(line_item.cm(:length).to_s)
            xml.width(line_item.cm(:width).to_s)
            xml.height(line_item.cm(:height).to_s)
            xml.description(line_item.options[:description] || ' ')
            xml.readyToShip(line_item.options[:ready_to_ship] || nil)
            # By setting the 'readyToShip' tag to true, Sell Online will not pack this item in the boxes defined in the merchant profile.
          end
        end
      end
    end
<!-- List of items in the shopping    -->
 <!-- cart                             -->
 <!-- Each item is defined by :        -->
 <!--   - quantity    (mandatory)      -->
 <!--   - size        (mandatory)      -->
 <!--   - weight      (mandatory)      -->
 <!--   - description (mandatory)      -->
 <!--   - ready to ship (optional)     -->