code: def recover() -> None:
      try:
          from transformers.modeling_utils import PreTrainedModel
      except ImportError:
          return
      # convert plain function to class method
      PreTrainedModel.from_pretrained = classmethod(
          PretrainedManager.old_from_pretrained
      )
      PretrainedManager.old_from_pretrained = None
  
file_path: ColossalAI/colossalai/lazy/pretrained.py
imports: import os
  from typing import Callable, Optional, Union
  import torch
  from torch.nn import Module
  from colossalai.interface import pretrained
label_desc: Use image node_id 2 for calling the PretrainedManager obj's underlying member method code with example usage: obj.recover() without return types