code: def _test_idist_methods_in_hvd_context(backend, device):
      # We explicitly set _model as _SerialModel
      # then call idist.* methods and check that they give correct values
      import horovod.torch as hvd
  
      from ignite.distributed.utils import _SerialModel, _set_model
  
      hvd.init()
  
      _set_model(_SerialModel())
  
      ws = hvd.size()
      rank = hvd.rank()
      local_rank = hvd.local_rank()
  
      if torch.cuda.is_available():
          torch.cuda.set_device(local_rank)
  
      _test_distrib_config(
          local_rank,
          backend=backend,
          ws=ws,
          true_device=device,
          rank=rank,
      )
  
      hvd.shutdown()
  
imports: import os
  import pytest
  import torch
  import ignite.distributed
  from ignite.distributed.utils import has_hvd_support
  from tests.ignite.distributed.utils import _test_distrib__get_max_length, _test_distrib_all_gather, _test_distrib_all_gather_group, _test_distrib_all_reduce, _test_distrib_all_reduce_group, _test_distrib_barrier, _test_distrib_broadcast, _test_distrib_config, _test_distrib_new_group, _test_distrib_one_rank_only, _test_distrib_one_rank_only_with_engine, _test_sync
label_desc: Use image node_id 9 for calling a global function with example usage: _test_idist_methods_in_hvd_context(backend, device) without return types