protected function invoke($name = 0, $param = null) {
        $ret = parent::invoke($name, $param);
        $this->retMsg = $this->_object->retMsg;
        return $ret;
    }
protected function invoke($name = 0, $param = null) {
        $ret = parent::invoke($name, $param);
        $this->retMsg = $this->_object->retMsg;
        return $ret;
    }
{@inheritdoc}