Removing a custom name or not item from a stack

Hello,I'm trying to edit a cosmetics plugin to add some things I want, like a lightning stick which when you tap it(with interact event),it will remove one "lightning stick",but theres a problem.The first time it was removing all the sticks not the 1 only,and the other times when I searched my problem here, it wasn't do anything,or it was removing any item on hand,or it was giving errors.

 

PHP:

 public function onInteract(PlayerInteractEvent $ev)
  {
        $index = $ev->getPlayer()->getInventory()->getItemInHand()->getCustomName() == "Lightning stick";
        if($index){
        $item = Item::get(280);
        $item->pop();
        $level = $ev->getPlayer()->getLevel();
        $lightning = new AddEntityPacket();
        $lightning->type = 93;
        $lightning->entityRuntimeId = Entity::$entityCount++;
        $lightning->metadata = [];
        $lightning->position = $ev->getPlayer()->asVector3()->add(0, $height = 0);
        $lightning->yaw = $ev->getPlayer()->getYaw();
        $lightning->pitch = $ev->getPlayer()->getPitch();
        $ev->getPlayer()->getServer()->broadcastPacket($level->getPlayers(), $lightning);
    }
   }
  }


 

I tried copy pasting all the possibly working codes to my plugin,but I had problems on every change I had done.

 

try this

PHP:

public function onPlayerInteract(PlayerInteractEvent $ev): void{
    $player = $ev->getPlayer();
    if(($item = $player->getInventory()->getItemInHand())->getCustomName() == "Lightning stick"){
        $player->getInventory()->setItemInHand($item->pop());
        $lightning = new AddEntityPacket();
        $lightning->type = Entity::LIGHTNING_BOLT;
        $lightning->entityRuntimeId = Entity::$entityCount++;
        $lightning->metadata = [];
        $lightning->position = $player;
        $lightning->yaw = $player->getYaw();
        $lightning->pitch = $player->getPitch();
        $player->getServer()->broadcastPacket($player->getLevel()->getPlayers(), $lightning);
    }
}


 

I tried now,but it still doesn't work.It just spawns the lightning.