code: def __init__(self):
      # keep a list of saved checkpoint path
      self._saved_paths: List[str] = []
      self._post_training_snapshot_path = None
      log_class_usage(__class__)
  
imports: import abc
  from typing import List
  import torch
  from pytext.utils.file_io import PathManager
  from pytext.utils.usage import log_class_usage
label_desc: Use image node_id 1 to create a new CheckpointManager object from inherited base classes: PyTextCheckpointManagerInterface with example: obj = CheckpointManager()