pocketmine\Server::isLevelGenerated PHP Method

    public function isLevelGenerated($name)
    {
        if (trim($name) === "") {
            return false;
        }
        $path = $this->getDataPath() . "worlds/" . $name . "/";
        if (!$this->getLevelByName($name) instanceof Level) {
            if (LevelProviderManager::getProvider($path) === null) {
                return false;
            }
        }
        return true;
    }

 public function __construct(array $args, Main $main)
 {
     $this->name = $args["name"];
     $this->motto = $args["motto"];
     $this->id = $args["id"];
     $this->founder = $args["founder"];
     $this->ranks = $args["ranks"];
     $this->defaultRank = $args["default-rank"];
     $this->allyRank = $args["ally-rank"];
     $this->truceRank = $args["truce-rank"];
     $this->stdRank = $args["std-rank"];
     $this->members = $args["members"];
     $this->lastActive = $args["last-active"];
     $this->chunks = $args["chunks"];
     $this->homes = $args["homes"];
     $this->main = $main;
     $this->whitelist = $args["whitelist"];
     $this->reputation = isset($args["reputation"]) ? $args["reputation"] : 0;
     $this->server = $this->main->getServer();
     $levels = [];
     foreach ($this->chunks as $chunk) {
         $level = $chunk->getLevel();
         if (!isset($levels[$level])) {
             $levels[] = $level;
             if (!$this->server->isLevelLoaded($level)) {
                 if (!$this->server->isLevelGenerated($this->server->loadLevel($level))) {
                     $this->server->generateLevel($level, $this->main->getLevelGenerationSeed());
                 }
                 $this->server->loadLevel($level);
             }
         }
     }
     $this->initializeXEconEntity($main->getXEcon($this->server));
 }