src/Resource/LocalizedResource.php
protected function getLocaleFromInput($input = null): string
    {
        if ($input instanceof Locale) {
            $input = $input->getCode();
        }

        if (null === $input) {
            return $this->localeCode;
        }

        if ($this->sys->getLocale() && $input !== $this->sys->getLocale()) {
            throw new \InvalidArgumentException(\sprintf(
                'Entry with ID "%s" was built using locale "%s", but now access using locale "%s" is being attempted.',
                $this->sys->getId(),
                $this->sys->getLocale(),
                $input
            ));
        }

        if (!\in_array($input, $this->localeCodes, true)) {
            throw new \InvalidArgumentException(\sprintf(
                'Trying to use invalid locale "%s", available locales are "%s".',
                $input,
                \implode(', ', $this->localeCodes)
            ));
        }

        return $input;
    }
protected function getLocaleFromInput($input = null): string
    {
        if ($input instanceof Locale) {
            $input = $input->getCode();
        }

        if (null === $input) {
            return $this->localeCode;
        }

        if ($this->sys->getLocale() && $input !== $this->sys->getLocale()) {
            throw new \InvalidArgumentException(\sprintf(
                'Entry with ID "%s" was built using locale "%s", but now access using locale "%s" is being attempted.',
                $this->sys->getId(),
                $this->sys->getLocale(),
                $input
            ));
        }

        if (!\in_array($input, $this->localeCodes, true)) {
            throw new \InvalidArgumentException(\sprintf(
                'Trying to use invalid locale "%s", available locales are "%s".',
                $input,
                \implode(', ', $this->localeCodes)
            ));
        }

        return $input;
    }
@param Locale|string|null $input

@throws \InvalidArgumentException when $locale is not one of the locales supported by the space

@return string