code: def test_use_device_cpu(self):
      with use_device(torch.device("cpu")):
          pass
  
imports: import pytest
  import torch
  from fairscale.nn.pipe.stream import CPUStream, current_stream, default_stream, get_device, is_cuda, new_stream, record_stream, use_device, use_stream, wait_stream
label_desc: Use image node_id 1 for calling the TestUseDevice obj's underlying member method code with example usage: obj.test_use_device_cpu() without return types