public function setExpire($secondsOrTimestamp, $isTimestamp = false)
    {
        if ($secondsOrTimestamp !== null) {
            trigger_error('Expire option is deprecated, because expire behaviour was changed in Redis 2.2. Use expire method instead.', E_USER_WARNING);
        }

        $this->_options['expire'] = $secondsOrTimestamp;
        $this->_options['expireIsTimestamp'] = $isTimestamp;
        
        return $this;
    }