code: def test_parity3d_checkpoint_syncbn_twice():
      assert 1 == 2
  
imports: import functools
  import tempfile
  import pytest
  import torch
  import torch.distributed
  import torch.multiprocessing
  import torch.nn
  from torch.nn.parallel import DistributedDataParallel
  from fairscale.experimental.nn import SyncBatchNorm
  from fairscale.nn.checkpoint import checkpoint_wrapper
label_desc: Use image node_id 8 for calling a global function with example usage: test_parity3d_checkpoint_syncbn_twice() without return types