private function getMetadataForRegion($regionCode)
    {
        $countryCallingCode = $this->phoneUtil->getCountryCodeForRegion($regionCode);
        $mainCountry = $this->phoneUtil->getRegionCodeForCountryCode($countryCallingCode);
        $metadata = $this->phoneUtil->getMetadataForRegion($mainCountry);
        if ($metadata !== null) {
            return $metadata;
        }
        // Set to a default instance of teh metadata. This allows us to function with an incorrect
        // region code, even if the formatting only works for numbers specified with "+".
        return self::$emptyMetadata;
    }