code: def __init__(self):
      super().__init__()
      self.linear1 = torch.nn.Linear(4, 4)
      self.linear2 = torch.nn.Linear(4, 4)
      self.linear3 = torch.nn.Linear(4, 4)
      self.linear4 = torch.nn.Linear(4, 4)
      self.linear5 = torch.nn.Linear(4, 4)
      self.linear6 = torch.nn.Linear(4, 4)
  
file_path: colossalai/tests/test_fx/test_codegen/test_nested_activation_checkpoint_codegen.py
imports: import pytest
  import torch
  import colossalai
  from colossalai.fx import ColoTracer
  from colossalai.fx.graph_module import ColoGraphModule
  from colossalai.legacy.core import global_context
  from colossalai.testing import rerun_if_address_is_in_use, spawn
label_desc: Use image node_id 1 to create a new MyModule object from inherited base classes: torch.nn with example: obj = MyModule()