how to bukkitrun is stop?

Code:

public void openShop(Player player, StockMData shop)

    {
       
        Gui gui = new Gui(this, shop, stockM);
        gui.setPlayer(player);
        if(data.isTransaction()){
            runnablesetting(player, gui);
            runnable.runTaskTimerAsynchronously(stockM, 0, 100);
        }
        else {
            player.openInventory(gui.getInventory());
        }
    }
   
    public void runnablesetting(Player player, Gui gui){
        runnable = (BukkitRunnable) new BukkitRunnable() {
           
            @Override
            public void run() {
                System.out.println("S");
                PDate = new Date();
                player.openInventory(gui.getInventory());
            }
        };
    }

Refresh the inventory every second. By the way, I want to stop this timer when I close the inventory, but what is it?
InventoryCloseEvent used, but timer only operates twice.