.Output("output1: uint8")
      .Attr("SomeDataTypeAttr: type");

  TF_KernelBuilder* builder = TF_NewKernelBuilder(
      op_name, device_name, &MyCreateFunc, &MyComputeFunc, &MyDeleteFunc);

  KernelDef kernel_def;
  kernel_def.set_op(op_name);
  kernel_def.set_device_type(device_name);
  std::string kernel_def_str = kernel_def.SerializePartialAsString();

  {
    TF_Status* status = TF_NewStatus();