code: def __exit__(self, exc_type, exc_value, traceback):
      torch._C._set_grad_enabled(self.prev)
  
imports: import unittest
  import torch
  import torch._dynamo.test_case
  import torch._dynamo.testing
  import torch.onnx.operators
  from torch._dynamo.testing import EagerAndRecordGraphs, normalize_gm, same
  from torch.nn import functional
  from torch.testing._internal.common_cuda import PLATFORM_SUPPORTS_FLASH_ATTENTION
  from torch.testing._internal.common_utils import TEST_WITH_ROCM
label_desc: Use image node_id 3 for calling the CutomizedCtxManager obj's underlying member method code with example usage: obj.__exit__(exc_type, exc_value, traceback) without return types