addMissingCountryStates example

foreach ($defaultCountryStateTranslations as $shortCode => $deTranslation) {
                    if (!\array_key_exists($shortCode, $correctDeTranslations)) {
                        continue;
                    }

                    $defaultCountryStateTranslations[$shortCode] = $correctDeTranslations[$shortCode];
                }
            }

            $this->swapDefaultLanguageId($newDefaultLanguageId);
            $this->addMissingCountryStates($defaultCountryStateTranslations);
        } else {
            $this->changeDefaultLanguageData($newDefaultLanguageId, $currentLocale, $locale);
        }
    }

    public function setDefaultCurrency(string $currencyCode): void
    {
        $currentCurrencyIso = $this->connection->fetchOne(
            'SELECT iso_code FROM currency WHERE id = :currencyId',
            ['currencyId' => Uuid::fromHexToBytes(Defaults::CURRENCY)]
        );