public function add_item(Model_Purchase $purchase, Jam_Event_Data $data, Model_Purchase_Item $purchase_item)
{
if ($brand_purchase = $purchase_item->brand_purchase and $purchase->shipping_country()) {
if (!$brand_purchase->shipping) {
$brand_purchase->build('shipping');
}
$brand_purchase->shipping->build_item_from($purchase_item);
}
}
