pocketmine\inventory\BaseInventory::sendSlot PHP Метод

    public function sendSlot($index, $target)
    {
        if ($target instanceof Player) {
            $target = [$target];
        }
        $pk = new ContainerSetSlotPacket();
        $pk->slot = $index;
        $pk->item = clone $this->getItem($index);
        foreach ($target as $player) {
            if (($id = $player->getWindowId($this)) === -1) {
                $this->close($player);
                continue;
            }
            $pk->windowid = $id;
            $player->dataPacket($pk);
        }
    }