getManufacturerNumber example

$product->setReleaseDate($listProduct->getReleaseDate());
        $product->setShippingTime($listProduct->getShippingTime());
        $product->setShortDescription($listProduct->getShortDescription());
        $product->setStock($listProduct->getStock());
        $product->setWeight($listProduct->getWeight());
        $product->setWidth($listProduct->getWidth());
        $product->setPriceGroup($listProduct->getPriceGroup());
        $product->setCreatedAt($listProduct->getCreatedAt());
        $product->setUpdatedAt($listProduct->getUpdatedAt());
        $product->setPriceRules($listProduct->getPriceRules());
        $product->setCheapestPriceRule($listProduct->getCheapestPriceRule());
        $product->setManufacturerNumber($listProduct->getManufacturerNumber());
        $product->setMetaTitle($listProduct->getMetaTitle());
        $product->setTemplate($listProduct->getTemplate());
        $product->setHasConfigurator($listProduct->hasConfigurator());
        $product->setSales($listProduct->getSales());
        $product->setHasEsd($listProduct->hasEsd());
        $product->setEsd($listProduct->getEsd());
        $product->setIsPriceGroupActive($listProduct->isPriceGroupActive());
        $product->setBlockedCustomerGroupIds($listProduct->getBlockedCustomerGroupIds());
        $product->setVoteAverage($listProduct->getVoteAverage());
        $product->setHasAvailableVariant($listProduct->hasAvailableVariant());
        $product->setCheapestUnitPrice($listProduct->getCheapestUnitPrice());
        

'update' => $updateDate,
            'sales' => $product->getSales(),
            'filtergroupID' => null,
            'priceStartingFrom' => null,
            'pseudopricePercent' => null,
            // Flag inside mini product             'sVariantArticle' => null,
            'sConfigurator' => $product->hasConfigurator(),
            // Only used for full products             'metaTitle' => $product->getMetaTitle(),
            'shippingfree' => $product->isShippingFree(),
            'suppliernumber' => $product->getManufacturerNumber(),
            'notification' => $product->allowsNotification(),
            'ean' => trim((string) $product->getEan()),
            'keywords' => $product->getKeywords(),
            'template' => $product->getTemplate(),
            'attributes' => $product->getAttributes(),
            'allowBuyInListing' => $product->allowBuyInListing(),
        ];

        if ($product->hasAttribute('core')) {
            $attributes = $product->getAttribute('core')->toArray();
            unset($attributes['id'], $attributes['articleID'], $attributes['articledetailsID']);