setPackUnit example

        if (isset($data['__unit_description'])) {
            $unit->setName($data['__unit_description']);
        }

        if (isset($data['__unit_unit'])) {
            $unit->setUnit($data['__unit_unit']);
        }

        if (isset($data['__unit_packunit'])) {
            $unit->setPackUnit($data['__unit_packunit']);
        }

        if (isset($data['__unit_purchaseunit'])) {
            $unit->setPurchaseUnit((float) $data['__unit_purchaseunit']);
        }

        if (isset($data['__unit_referenceunit'])) {
            $unit->setReferenceUnit((float) $data['__unit_referenceunit']);
        }

        if (isset($data['__unit_purchasesteps'])) {