def.set_device("FakeDevice");
    (*def.mutable_attr())["Attr"] = v;
    return CreateOpKernel(DeviceType("FakeDevice"), nullptr, nullptr, def, 1,
                          status);
  }

  void CreateAndCallKernelWithAttr(MyCreateFuncWithAttr MyCreateFuncAttr,
                                   const char* op_name, AttrValue& v) {
    TF_KernelBuilder* builder = TF_NewKernelBuilder(