Vsch\TranslationManager\Manager::cachePrefix PHP Method

    public function cachePrefix()
    {
        if ($this->persistentPrefix === null) {
            if (array_key_exists(self::PERSISTENT_PREFIX_KEY, $this->config())) {
                $this->persistentPrefix = $this->config(self::PERSISTENT_PREFIX_KEY);
            } else {
                $this->persistentPrefix = '';
            }
        } elseif ($this->cacheTransKey == null) {
            $this->cacheTransKey = $this->persistentPrefix ? $this->persistentPrefix . 'translations' : '';
        }
        return $this->persistentPrefix;
    }