Sulu\Component\Webspace\Manager\WebspaceManagerInterface::findWebspaceByKey PHP Method

    public function findWebspaceByKey($key);

 public function findAvailableLocale($webspaceName, array $availableLocales, $locale)
 {
     if (!$webspaceName) {
         return;
     }
     // get localization object for querying parent localizations
     $webspace = $this->webspaceManager->findWebspaceByKey($webspaceName);
     $localization = $webspace->getLocalization($locale);
     if (null === $localization) {
         return;
     }
     $resultLocalization = null;
     // find first available localization in parents
     $resultLocalization = $this->findAvailableParentLocalization($availableLocales, $localization);
     // find first available localization in children, if no result is found yet
     if (!$resultLocalization) {
         $resultLocalization = $this->findAvailableChildLocalization($availableLocales, $localization);
     }
     // find any localization available, if no result is found yet
     if (!$resultLocalization) {
         $resultLocalization = $this->findAvailableLocalization($availableLocales, $webspace->getLocalizations());
     }
     if (!$resultLocalization) {
         return;
     }
     return $resultLocalization->getLocale();
 }