code: public function getLanguagesQueryString()
      {
          $languages = [];
  
          foreach ($this->getLanguages() as $language) {
              $languageIdentity = $this->identityService->findOneBy([
                  'adapterIdentifier' => (string) $language['id'],
                  'adapterName' => PlentymarketsAdapter::NAME,
                  'objectType' => Language::TYPE,
              ]);
  
              if ($languageIdentity === null) {
                  continue;
              }
  
              $isMapped = $this->identityService->isMappedIdentity(
                  $languageIdentity->getObjectIdentifier(),
                  Language::TYPE,
                  PlentymarketsAdapter::NAME
              );
  
              if ($isMapped) {
                  $languages[] = $language['id'];
              }
          }
  
          return implode(',', $languages);
      }
docs: {@inheritdoc}