const std::vector<string>& list) {
    std::unique_ptr<const void*[]> list_ptrs;
    std::unique_ptr<size_t[]> list_lens;
    StringVectorToArrays(list, &list_ptrs, &list_lens);
    TF_SetAttrStringList(desc, tensorflow::kColocationAttrName, list_ptrs.get(),
                         list_lens.get(), list.size());
  }

  void SetViaProto(TF_OperationDescription* desc,