BasketItemBase::getProvider

public function getProvider()
{
	if ($this->provider !== null)
		return $this->provider;

	$module = $this->getField('MODULE');
	$productProviderName = $this->getField('PRODUCT_PROVIDER_CLASS');
	if (
		!isset($module)
		|| !isset($productProviderName)
		|| (strval($productProviderName) == "")
	)
	{
		return null;
	}

	$providerName = InternalsCatalogProvider::getProviderName($module, $productProviderName);
	if ($providerName !== null)
	{
		$this->provider = $providerName;
	}

	return $providerName;
}