code: def on_checkpoint_upload_end(self, uuid: str) -> None:
      self.uuids.append(uuid)
  
imports: import random
  from typing import Any, Dict, Tuple
  import numpy
  import torch
  from torch import nn
  from determined import pytorch
label_desc: Use image node_id 2 for calling the CheckpointCallback obj's underlying member method code with example usage: obj.on_checkpoint_upload_end(uuid) without return types