@EventHandler(priority = EventPriority.HIGHEST)
    public void inventoryClick(InventoryClickEvent event){
        if(event.getWhoClicked() instanceof Player){
            Player p = (Player) event.getWhoClicked();
            if(event.getCurrentItem()!=null){
                if(event.getCurrentItem().getType()!=Material.AIR){
                    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);
                    }
                }
            }
        }
    }