pocketmine\block\WaterLily::onUpdate PHP Method

    public function onUpdate($type)
    {
        if ($type === Level::BLOCK_UPDATE_NORMAL) {
            if (!$this->getSide(0) instanceof Water) {
                $this->getLevel()->useBreakOn($this);
                return Level::BLOCK_UPDATE_NORMAL;
            }
        }
        return false;
    }