Pairing chests

I have tried to pair two chests into one double chest, with no luck. It sets the chests, but does not pair them.

PHP:

$entity = $event->getEntity();
        $lvl = $entity->getLevel();
        if ($entity instanceof Player) {
            $x = $entity->getX();
            $y = $entity->getY();
            $z = $entity->getZ();

            $inventory = $entity->getInventory()->getContents();
            $event->setDrops(array(Item::get(Item::AIR)));
            $entity->getLevel()->setBlock(new Vector3($x, $y, $z), new Block(Block::CHEST), true, true);
            $entity->getLevel()->setBlock(new Vector3($x-1, $y, $z), new Block(Block::CHEST), true, true);
            $nbt = new CompoundTag("", [new ListTag("Items", []), new StringTag("id", Tile::CHEST), new IntTag("x", $x), new IntTag("y", $y), new IntTag("z", $z)]);
            $nbt->Items->setTagType(NBT::TAG_Compound);
            $tile = Tile::createTile("Chest", $entity->getLevel()->getChunk($x >> 4, $z >> 4), $nbt);
            $ochest = $lvl->getTile(new Vector3($x-1, $y, $z));
            $chest = $lvl->getTile(new Vector3($x, $y, $z));
            if($chest instanceof Chest){
                if($chest->isPaired() === false){
                    if($ochest instanceof Chest){
                    $chest->pairWith($ochest);
                    $chest->getInventory()->setContents($inventory);
                }

            }
        }
    }

Bump ^^

No one at all?