Piwik\Tracker\Response::init PHP Method

    public function init(Tracker $tracker)
    {
        ob_start();
        // we use ob_start only because of Common::printDebug, we should actually not really use ob_start
        if ($tracker->isDebugModeEnabled()) {
            $this->timer = new Timer();
            TrackerDb::enableProfiling();
        }
    }

 public function init(Tracker $tracker, RequestSet $requestSet)
 {
     $this->response->init($tracker);
 }