public function onRun()
 {
     Block::init();
     Biome::init();
     $manager = new SimpleChunkManager($this->seed);
     $this->saveToThreadStore("generation.level{$this->levelId}.manager", $manager);
     /** @var Generator $generator */
     $generator = $this->generator;
     $generator = new $generator($this->settings);
     $generator->init($manager, new Random($manager->getSeed()));
     $this->saveToThreadStore("generation.level{$this->levelId}.generator", $generator);
 }