WellCommerce\Bundle\CurrencyBundle\Formatter\CurrencyFormatter::getLocale PHP Method

    private function getLocale(string $locale = null) : string
    {
        if (null === $locale) {
            if (null === $this->forcedLocale) {
                return $this->requestHelper->getCurrentLocale();
            } else {
                return $this->forcedLocale;
            }
        }
        return $locale;
    }