pocketmine\entity\ThrownPotion::onUpdate PHP Method

    public function onUpdate($currentTick)
    {
        if ($this->closed) {
            return false;
        }
        $this->timings->startTiming();
        $hasUpdate = parent::onUpdate($currentTick);
        $this->age++;
        if ($this->age > 1200 or $this->isCollided) {
            $this->kill();
            $this->close();
            $hasUpdate = true;
        }
        if ($this->onGround) {
            $this->kill();
            $this->close();
        }
        $this->timings->stopTiming();
        return $hasUpdate;
    }