pocketmine\Server::getUpdater PHP Method

    public function getUpdater()
    {
        return $this->updater;
    }

 public function onCompletion(Server $server)
 {
     $updater = $server->getUpdater();
     if ($this->status) {
         $updater->downloadCompleteCallback();
     } else {
         $updater->downloadFailCallback();
     }
 }