BasketItemBase::getReservedQuantity

public function getReservedQuantity();

/**
 * @return bool
 * @throws MainArgumentNullException
 * @throws MainArgumentOutOfRangeException
 */
public function isCustom()
{
	$moduleId = trim($this->getField('MODULE'));
	$providerClassName = trim($this->getField('PRODUCT_PROVIDER_CLASS'));
	$callback = trim($this->getField('CALLBACK_FUNC'));

	return (empty($moduleId) && empty($providerClassName) && empty($callback));
}