pocketmine\command\defaults\VanillaCommand::__construct PHP Method

    public function __construct($name, $description = "", $usageMessage = null, array $aliases = [])
    {
        parent::__construct($name, $description, $usageMessage, $aliases);
    }

 public function __construct($name)
 {
     parent::__construct($name, "Shows the help menu", "/help [pageNumber]\n/help <topic> [pageNumber]", ["?"]);
     $this->setPermission("pocketmine.command.help");
 }