models/classes/runner/time/QtiTimer.php
public function setConsumedExtraTime($time)
    {
        $this->consumedExtraTime = max($this->consumedExtraTime, floatval($time));
        return $this;
    }
public function setConsumedExtraTime($time)
    {
        $this->consumedExtraTime = max($this->consumedExtraTime, floatval($time));
        return $this;
    }
Sets the added extra time
@param float $time
@return $this