@Override
 public void robotTakenBook(Robot robot, Desk desk, Book book, Environment environment) {
   // Dostarczanie z biurka
   if (robot.getCache().contains(book) && currentTasks.get(robot).getSourceDesk().equals(desk)) {
     //     System.out.println("Robot: " + robot.getName() + " ma w kieszeni książkę: " + book + "
     // którą dosatrczy na półkę.");
     if (robot.getCacheSize() > robot.getCache().size()) {
       recentTasks.put(currentTasks.get(robot), robot);
       this.getNewCurrentTask(robot);
     }
   }
 }
 private Task getNewTaskFromQueue(Queue<Task> queue, Robot robot) {
   Task task = null;
   for (int i = 0; i < robot.getCacheSize(); i++) {
     if (queue.peek() != null) {
       task = queue.poll();
       robotTasks.put(task, robot);
     }
   }
   if (task != null) {
     currentTasks.put(robot, task);
   }
   return task;
 }