public function stop($key, $timetamp = null)
    {
        $event = new End($key, $timetamp);
        $this->dispatcher->dispatch(End::EVENT_NAME, $event);
    }
public function stop($key, $timetamp = null)
    {
        $event = new End($key, $timetamp);
        $this->dispatcher->dispatch(End::EVENT_NAME, $event);
    }
public function stop ( $ key , $ timetamp = null ) { $ event = new End ( $ key , $ timetamp ) ; $ this -> dispatcher -> dispatch ( End :: EVENT_NAME , $ event ) ; }
End item for the timeline

@param $key
@param null $timetamp
End item for the timeline