BasketBuilderExist::setItemData

public function setItemData($basketCode, &$productData, &$item)
{
	if ($basketCode != $productData["BASKET_CODE"])
		$productData["BASKET_CODE"] = $item->getBasketCode();

	if(isset($productData["OFFER_ID"]) && intval($productData["OFFER_ID"]) > 0)
		$productData["PRODUCT_ID"] = $productData["OFFER_ID"];

	$itemFields = array_intersect_key($productData, array_flip($item::getAvailableFields()));

	if(isset($itemFields["MEASURE_CODE"]) && $itemFields["MEASURE_CODE"] <> '')
	{
		$measures = $this->builder->getCatalogMeasures();

		if(isset($measures[$itemFields["MEASURE_CODE"]]) && $measures[$itemFields["MEASURE_CODE"]] <> '')
			$itemFields["MEASURE_NAME"] = $measures[$itemFields["MEASURE_CODE"]];
	}

	$providerData = [];

	if(!empty($productData["PROVIDER_DATA"]) && !$this->builder->isNeedUpdateNewProductPrice() && CheckSerializedData($productData["PROVIDER_DATA"]))
	{
		$providerData = unserialize($productData["PROVIDER_DATA"], ['allowed_classes' => false]);
	}

	if (is_array($providerData) && !empty($providerData))
	{
		$this->builder->sendProductCachedDataToProvider($item, $this->builder->getOrder(), $providerData);
	}

	if(!empty($productData["SET_ITEMS_DATA"]) && CheckSerializedData($productData["SET_ITEMS_DATA"]))
		$productData["SET_ITEMS"] = unserialize($productData["SET_ITEMS_DATA"], ['allowed_classes' => false]);

	$this->builder->setBasketItemFields($item, $itemFields);
}