code: def checkpoint_0(self, x):
      return (
          checkpoint(self.checkpoint_0_0, x)
          + checkpoint(self.checkpoint_0_1, x)
          + self.e(x)
      )
  
file_path: ColossalAI/tests/test_analyzer/test_fx/test_nested_ckpt.py
imports: import pytest
  import torch
  import torch.nn
  from torch.utils.checkpoint import checkpoint
  from colossalai.testing import clear_cache_before_run
label_desc: Use image node_id 2 for calling the MyModule obj's underlying member method code with example usage: obj.checkpoint_0(x) and returns: unknown