code: def __enter__(self):
      return self
  
imports: import functools
  import unittest
  from importlib import import_module
  import torch
  import torch._dynamo.config
  import torch._dynamo.test_case
  import torch._functorch.config
  import torch.utils.checkpoint
  from functorch.compile import min_cut_rematerialization_partition
  from torch._dynamo.backends.common import aot_autograd
  from torch._dynamo.testing import CompileCounterWithBackend
  from torch._higher_order_ops.wrap import tag_activation_checkpoint
  from torch.testing._internal.common_utils import IS_WINDOWS, skipIfRocm
  from torch.testing._internal.inductor_utils import HAS_CUDA
  from torch.testing._internal.two_tensor import TwoTensor
  from torch.utils.checkpoint import _pt2_selective_checkpoint_context_fn_gen, checkpoint
label_desc: Use image node_id 2 for calling the _InvalidContext obj's underlying member method code with example usage: obj.__enter__() and returns: self