pocketmine\Server::getLevels PHP Method

    public function getLevels()
    {
        return $this->levels;
    }

 private function generalData()
 {
     $version = new VersionString();
     $this->data["general"] = [];
     $this->data["general"]["version"] = $version->get(false);
     $this->data["general"]["build"] = $version->getBuild();
     $this->data["general"]["protocol"] = Info::CURRENT_PROTOCOL;
     $this->data["general"]["api"] = \pocketmine\API_VERSION;
     $this->data["general"]["git"] = \pocketmine\GIT_COMMIT;
     $this->data["general"]["raklib"] = RakLib::VERSION;
     $this->data["general"]["uname"] = php_uname("a");
     $this->data["general"]["php"] = phpversion();
     $this->data["general"]["zend"] = zend_version();
     $this->data["general"]["php_os"] = PHP_OS;
     $this->data["general"]["os"] = Utils::getOS();
     $this->addLine("Genisys version: " . $version->get(false) . " #" . $version->getBuild() . " [Protocol " . Info::CURRENT_PROTOCOL . "; API " . API_VERSION . "]");
     $this->addLine("uname -a: " . php_uname("a"));
     $this->addLine("PHP version: " . phpversion());
     $this->addLine("Zend version: " . zend_version());
     $this->addLine("OS : " . PHP_OS . ", " . Utils::getOS());
     $this->addLine();
     $this->addLine("Server uptime: " . $this->server->getUptime());
     $this->addLine("Number of loaded worlds: " . count($this->server->getLevels()));
     $this->addLine("Players online: " . count($this->server->getOnlinePlayers()) . "/" . $this->server->getMaxPlayers());
 }