public static function getNameMap(): array
    {
        if (self::$nameMap === null) {
            self::$nameMap = [];
            $countries     = self::getLoader()->all();

            foreach ($countries as $country) {
                self::$nameMap[$country['alpha2']] = $country['name'];
            }

            self::$alpha2CodeMap = array_flip(self::$nameMap);
        }

        return self::$nameMap;
    }