code: def test_stateless_functional_call_warns(self):
      m = torch.nn.Linear(1, 1)
      params = dict(m.named_parameters())
      x = torch.randn(3, 1)
      with self.assertWarnsRegex(
          UserWarning, "Please use torch.func.functional_call"
      ):
          stateless.functional_call(m, params, x)
  
imports: import contextlib
  import os
  import re
  import subprocess
  import sys
  import unittest
  import torch
  import torch.nn.utils.stateless
  from torch.testing._internal.common_cuda import TEST_MULTIGPU
  from torch.testing._internal.common_utils import run_tests, TestCase, parametrize, instantiate_parametrized_tests, subtest
label_desc: Use image node_id 2 for calling the TestStatelessDeprecation obj's underlying member method code with example usage: obj.test_stateless_functional_call_warns() without return types