pocketmine\block\WallSign::onUpdate PHP Метод

    public function onUpdate($type)
    {
        $faces = [2 => 3, 3 => 2, 4 => 5, 5 => 4];
        if ($type === Level::BLOCK_UPDATE_NORMAL) {
            if (isset($faces[$this->meta])) {
                if ($this->getSide($faces[$this->meta])->getId() === self::AIR) {
                    $this->getLevel()->useBreakOn($this);
                }
                return Level::BLOCK_UPDATE_NORMAL;
            }
        }
        return false;
    }