code: def cpu_or_gpu(test_method):
      """
      Decorator to indicate that a test should run on both CPU and GPU
      """
      return pytest.mark.gpu(test_method)
  
file_path: allennlp/allennlp/common/testing/__init__.py
imports: from typing import Dict, Any, Optional, Union, Tuple, List
  import torch
  from torch.testing import assert_allclose
  import pytest
  from allennlp.common.testing.test_case import AllenNlpTestCase
  from allennlp.common.testing.model_test_case import ModelTestCase
  from allennlp.common.testing.distributed_test import run_distributed_test
  from allennlp.modules.transformer import TransformerModule
  from allennlp.training.metrics import Metric
label_desc: Use image node_id 4 for calling a global function with example usage: cpu_or_gpu(test_method) and returns: pytest