pocketmine\level\generator\Flat::populateChunk PHP Method

    public function populateChunk($chunkX, $chunkZ)
    {
        $this->random->setSeed(0xdeadbeef ^ $chunkX << 8 ^ $chunkZ ^ $this->level->getSeed());
        foreach ($this->populators as $populator) {
            $populator->populate($this->level, $chunkX, $chunkZ, $this->random);
        }
    }