code: def test_foreach_cpp_wrapper_cuda(self):
      self._test_single_list(op=torch._foreach_add)
  
imports: import sys
  import unittest
  import torch
  import torch._inductor
  from torch.testing._internal.common_utils import instantiate_parametrized_tests, IS_FBCODE, parametrize, TestCase
  from torch.testing._internal.inductor_utils import HAS_CPU, HAS_CUDA
label_desc: Use image node_id 6 for calling the ForeachTests obj's underlying member method code with example usage: obj.test_foreach_cpp_wrapper_cuda() without return types