pocketmine\inventory\ChestInventory::getHolder PHP Method

    public function getHolder()
    {
        return $this->holder;
    }

 public function onClose(Player $who)
 {
     if (\count($this->getViewers()) === 1) {
         $pk = new TileEventPacket();
         $pk->x = $this->right->getHolder()->getX();
         $pk->y = $this->right->getHolder()->getY();
         $pk->z = $this->right->getHolder()->getZ();
         $pk->case1 = 1;
         $pk->case2 = 0;
         if (($level = $this->right->getHolder()->getLevel()) instanceof Level) {
             Server::broadcastPacket($level->getUsingChunk($this->right->getHolder()->getX() >> 4, $this->right->getHolder()->getZ() >> 4), $pk->setChannel(Network::CHANNEL_WORLD_EVENTS));
         }
     }
     parent::onClose($who);
 }