code: def _prep(self):
      torch.cuda.manual_seed(333)
      torch.manual_seed(333)
  
imports: import copy
  import typing
  import unittest
  import torch
  import torch.nn
  from torch.testing._internal import common_utils
  from apex.transformer.testing.distributed_test_base import NcclDistributedTestBase
label_desc: Use image node_id 1 for calling the TestCudnnGBN obj's underlying member method code with example usage: obj._prep() without return types