@EventHandler(priority = EventPriority.HIGHEST)
    public void inventoryClick(InventoryClickEvent event) {
        if (!(event.getWhoClicked() instanceof Player)) {
            return;
        }
        Player p = (Player) event.getWhoClicked();
        if (event.getCurrentItem() == null) {
            return;
        }
        if (event.getCurrentItem().getType() == Material.AIR) {
            return;
        }
        event.setCancelled(true);
        if (event.getCurrentItem().getType() == Material.STONE) {
            Inventory inv = Bukkit.getServer().createInventory(p, 54, "Some Name");
            p.playSound(p.getLocation(), Sound.ITEM_PICKUP, 10, 2);
            p.openInventory(inv);
        }
    }