code: def test_gather_object(self):
      output = (
          [None] * dist.get_world_size() if self.rank == 0 else None
      )
      dist.gather_object(obj=self.rank, object_gather_list=output)
  
      if self.rank == 0:
          for i, v in enumerate(output):
              self.assertEqual(i, v, f"rank: {self.rank}")
  
imports: import os
  import sys
  from functools import wraps, partial
  import torch
  import torch.distributed
  from torch.testing._internal.common_distributed import MultiProcessTestCase, TEST_SKIPS
  from torch.testing._internal.common_utils import run_tests, TEST_WITH_DEV_DBG_ASAN
label_desc: Use image node_id 8 for calling the TestObjectCollectives obj's underlying member method code with example usage: obj.test_gather_object() without return types