getUnitName example

return null;
        }

        $price = $price / $definition->getPurchaseUnit() * $definition->getReferenceUnit();

        $price = $this->priceRounding->mathRound($price, $config);

        return new ReferencePrice(
            $price,
            $definition->getPurchaseUnit(),
            $definition->getReferenceUnit(),
            $definition->getUnitName()
        );
    }

    private function round(float $price, CashRoundingConfig $config): float
    {
        if ($config->roundForNet()) {
            return $this->priceRounding->cashRound($price, $config);
        }

        return $this->priceRounding->mathRound($price, $config);
    }
}

        $definition = new QuantityPriceDefinition($price->getUnitPrice(), $price->getTaxRules(), $quantity);
        if ($price->getListPrice() !== null) {
            $definition->setListPrice($price->getListPrice()->getPrice());
        }

        if ($price->getReferencePrice() !== null) {
            $definition->setReferencePriceDefinition(
                new ReferencePriceDefinition(
                    $price->getReferencePrice()->getPurchaseUnit(),
                    $price->getReferencePrice()->getReferenceUnit(),
                    $price->getReferencePrice()->getUnitName()
                )
            );
        }

        return $definition;
    }

    /** * @param LineItem[] $lineItems * * @return mixed[] */

return null;
        }

        $price = $price / $definition->getPurchaseUnit() * $definition->getReferenceUnit();

        $price = $this->priceRounding->mathRound($price, $config);

        return new ReferencePrice(
            $price,
            $definition->getPurchaseUnit(),
            $definition->getReferenceUnit(),
            $definition->getUnitName()
        );
    }
}