pocketmine\block\RedstoneWire::onUpdate PHP Method

    public function onUpdate($type)
    {
        if ($type === Level::BLOCK_UPDATE_NORMAL) {
            $down = $this->getSide(Vector3::SIDE_DOWN);
            if ($down instanceof Transparent and $down->getId() != Block::INACTIVE_REDSTONE_LAMP and $down->getId() != Block::ACTIVE_REDSTONE_LAMP) {
                $this->getLevel()->useBreakOn($this);
                return Level::BLOCK_UPDATE_NORMAL;
            }
        }
        return true;
    }