code: def test_width_split(self):
      self._check_world_size_and_may_skip()
      W_split_tests(
          1,
          64,
          200,
          336,
          TestPeerMemory.HALF_HALO,
          self.rank,
          self.world_size,
          self.get_halo_excnahger_1d(),
          TestPeerMemory.NUM_STEPS,
      )
  
file_path: apex/apex/contrib/test/peer_memory/test_peer_halo_exchange_module.py
imports: import unittest
  import torch
  from torch.testing._internal import common_utils
  from apex.transformer.testing.distributed_test_base import NcclDistributedTestBase
label_desc: Use image node_id 5 for calling the TestPeerMemory obj's underlying member method code with example usage: obj.test_width_split() without return types