code: def exit_worker(self):
      if len(self.rank_to_history) == 0:
          return
      self.dump_record()
      # if this is rank 0, wait for merge
      rank = dist.get_rank()
  
      if rank == 1:
          # take the base time of rank 0 as standard
          self.merge_recode()
          self.visualize_record()
  
imports: import atexit
  import json
  import os
  import shutil
  import time
  from typing import Dict, List
  import matplotlib.colors
  import matplotlib.pyplot
  import torch
  import torch.distributed
label_desc: Use image node_id 11 for calling the Recorder obj's underlying member method code with example usage: obj.exit_worker() without return types