public function get($name = null)
    {
        if (func_num_args()) {
            return $this->_get($name);
        }
        $result = [];
        foreach ($this->_values as $key => $data) {
            foreach ($data as $extra => $value) {
                if ($extra === '') {
                    $result[$key] = $this->_get($key);
                } else {
                    $result[$key][$extra] = $this->_get($key . ':' . $extra);
                }
            }
        }
        return $result;
    }