CampSession::setTimer PHP Method

    function setTimer()
    {
        if (!$this->dataExists('session.timer.start')) {
            $now = time();
            $this->setData('session.timer.start', $now);
            $this->setData('session.timer.current', $now);
            $this->setData('session.timer.finish', $now);
        }
        $this->setData('session.timer.finish', $this->getData('session.timer.current'));
        $this->setData('session.timer.current', time());
    }