code: private function getKlarnaCountryId($country)
      {
          switch ($country) {
              case 'DE':
                  return self::DE;
              case 'AT':
                  return self::AT;
              case 'DK':
                  return self::DK;
              case 'FI':
                  return self::FI;
              case 'NL':
                  return self::NL;
              case 'NO':
                  return self::NO;
              case 'SE':
                  return self::SE;
              default:
                  return 0;
          }
      }
docs: @param string $country
  
  @return int