docs: public boolean restartJob(int containerIndex) {
      synchronized (this) {
        if (isTerminated) {
          LOG.severe("Job has been killed");
          return false;
        }
  
        // List of tasks to restart
        List<String> tasksToRestart = new ArrayList<>();
        if (containerIndex == -1) {
          // Restart all tasks
          tasksToRestart.addAll(tasksId.values());
        } else {
          tasksToRestart.add(tasksId.get(containerIndex));
        }
  
        // Kill the task -- the framework will automatically restart it
        for (String taskId : tasksToRestart) {
          driver.killTask(Protos.TaskID.newBuilder().setValue(taskId).build());
        }
  
        return true;
      }
    }