ShipmentItem::setField

public function setField($name, $value)
{
	if ($name === 'RESERVED_QUANTITY')
	{
		$oldValue = $this->getReservedQuantity();

		$result = parent::setField($name, $value);
		if ($result->isSuccess())
		{
			$this->setReserveQuantity($value, $oldValue);
		}

		return $result;
	}

	return parent::setField($name, $value);
}