"    }",
      &def));
  return def.SerializeAsString();
}

// a + a
string AddFunction() {
  tensorflow::FunctionDef def;
  CHECK(tensorflow::protobuf::TextFormat::ParseFromString(
      "    signature {"
      "      name: 'AddFunction'"
      "      input_arg {"
      "        name: 'a'"
      "        type: DT_FLOAT"
      "      }"