/**
* Get packed weight
* @return int weight in grams
*/
public function getWeight()
{
if (!is_null($this->weight)) {
return $this->weight;
}
$this->weight = $this->box->getEmptyWeight();
$items = clone $this->items;
foreach ($items as $item) {
$this->weight += $item->getWeight();
}
return $this->weight;
}
