public function flushArrays()
    {
        $this->_filesArray = null;
        $this->_imagesArray = null;
        $this->_foldersArray = null;
        $this->_filtersArray = null;
        $this->deleteHasCache(self::CACHE_KEY_FILE);
        $this->deleteHasCache(self::CACHE_KEY_IMAGE);
        $this->deleteHasCache(self::CACHE_KEY_FOLDER);
        $this->deleteHasCache(self::CACHE_KEY_FILTER);
    }