private static function getPadding(Zone $zone)
    {
        $name = $ttl = $type = 0;

        foreach ($zone as $resourceRecord) {
            $name = max($name, strlen($resourceRecord->getName()));
            $ttl = max($ttl, strlen($resourceRecord->getTtl()));
            $type = max($type, strlen($resourceRecord->getType()));
        }

        return [
            $name,
            $ttl,
            $type,
            $name + $ttl + $type + 6,
        ];
    }