i really don't understand
package com.codegym.task.task27.task2712;
import com.codegym.task.task27.task2712.kitchen.Cook;
import com.codegym.task.task27.task2712.kitchen.Waiter;
import java.io.IOException;
public class Restaurant {
public static void main(String[] args) throws IOException {
Tablet tablet1 = new Tablet(1);
Cook cook = new Cook("Mito");
tablet1.addObserver(cook);
Waiter waiter = new Waiter();
cook.addObserver(waiter);
tablet1.createOrder();
}
}