Hide noPerm Commands

Hello,
i found an old plugin on Github what do exactly what stands in the title. But how i said, its very old. I fixed it as far as i can, but here i need help.

PHP:

public function onSendPacket(DataPacketSendEvent $event){
        $packet = $event->getPacket();
        $player = $event->getPlayer();
        if($packet instanceof AvailableCommandsPacket){
            $data = [];
            foreach($this->plugin->getServer()->getCommandMap()->getCommands() as $command){
                if($player->hasPermission($command->getPermission())){
                    if(count($cmdData = $command->generateCustomCommandData($player)) > 0){
                        $data[$command->getName()]["versions"][0] = $cmdData;
                    }
                }
            }
            if(count($data) > 0){
                $packet->commands = json_encode($data);
            }
        }
    }



This is the code to hide the commands
And here is the error:

Code:

[17:02:35] [Server thread/CRITICAL]: Could not pass event 'pocketmine\event\server\DataPacketSendEvent' to 'BefehleVersteckenxD v1': Call to undefined method pocketmine\command\defaults\HelpCommand::generateCustomCommandData() on MrDoni98\HideExcess                                                           [17:02:35] [Server thread/CRITICAL]: Error: "Call to undefined method pocketmine\command\defaults\HelpCommand::generateCustomCommandData()" (EXCEPTION) in "HideExcess-master/src/MrDoni98/HideExcess" at line 25 

Please write here if you have any idea how to fix

 

generateCustomCommandData Isn’t define

 

It's not a method therefore you have to create that method

 

Ik that what I said