pocketmine\level\format\generic\BaseFullChunk::initChunk PHP Method

    public function initChunk()
    {
        if ($this->getProvider() instanceof LevelProvider and !$this->isInit) {
            $changed = false;
            if ($this->NBTentities !== null) {
                $this->getProvider()->getLevel()->timings->syncChunkLoadEntitiesTimer->startTiming();
                foreach ($this->NBTentities as $nbt) {
                    if ($nbt instanceof CompoundTag) {
                        if (!isset($nbt->id)) {
                            $this->setChanged();
                            continue;
                        }
                        if ($nbt["Pos"][0] >> 4 !== $this->x or $nbt["Pos"][2] >> 4 !== $this->z) {
                            $changed = true;
                            continue;
                            //Fixes entities allocated in wrong chunks.
                        }
                        if (($entity = Entity::createEntity($nbt["id"], $this, $nbt)) instanceof Entity) {
                            $entity->spawnToAll();
                        } else {
                            $changed = true;
                            continue;
                        }
                    }
                }
                $this->getProvider()->getLevel()->timings->syncChunkLoadEntitiesTimer->stopTiming();
                $this->getProvider()->getLevel()->timings->syncChunkLoadTileEntitiesTimer->startTiming();
                foreach ($this->NBTtiles as $nbt) {
                    if ($nbt instanceof CompoundTag) {
                        if (!isset($nbt->id)) {
                            $changed = true;
                            continue;
                        }
                        if ($nbt["x"] >> 4 !== $this->x or $nbt["z"] >> 4 !== $this->z) {
                            $changed = true;
                            continue;
                            //Fixes tiles allocated in wrong chunks.
                        }
                        if (Tile::createTile($nbt["id"], $this, $nbt) === null) {
                            $changed = true;
                            continue;
                        }
                    }
                }
                $this->getProvider()->getLevel()->timings->syncChunkLoadTileEntitiesTimer->stopTiming();
                $this->NBTentities = null;
                $this->NBTtiles = null;
            }
            $this->setChanged($changed);
            $this->isInit = true;
        }
    }