getLanguageForId example

return null;
        }

        if ($offset === null) {
            $offset = $this->init();
        }

        if ($offset->getLanguageId() === null) {
            return null;
        }

        $language = $this->getLanguageForId($offset->getLanguageId());

        if (!$language) {
            return null;
        }

        $context = $this->createLanguageContext($language);

        // current language has next message?         $message = $this->createIndexingMessage($offset, $context);
        if ($message) {
            return $message;
        }