code: private function getKlarnaPclassId($klarnaShopId, $countryIso)
      {
          try {
              $query = 'SELECT id FROM s_klarna_pclasses 
                        WHERE eid = :klarnaShopId 
                        AND country = :country';
  
              return $this->connection->fetchColumn($query, [
                  'klarnaShopId' => $klarnaShopId,
                  'country' => $this->getKlarnaCountryId($countryIso), ]
              );
          } catch (Exception $exception) {
              return '';
          }
      }
docs: @param string $klarnaShopId
  @param string $countryIso
  
  @return string