/** 
  * @param EntityInventoryChangeEvent $event 
  * @priority HIGHEST
  * @ignoreCancelled true
  */
 public function onEntityInventoryChange(EntityInventoryChangeEvent $event)
 {
     if (($player = $event->getEntity()) instanceof Player) {
         if ($this->plugin->getStorage()->getShield($player->getLevel())->isAllowed(Shield::INVENTORY_CHANGING)) {
             $event->setCancelled(true);
             $event->getPlayer()->sendTip($this->plugin->getConfig()->get("inventoryChangeNotAllowed"));
         }
     }
 }