}
      ASSERT_EQ(arg.name(), in.first) << "Got unexpected name for input " << i
                                      << ". fdef: " << fdef.DebugString();
    }
  }

  void VerifyFDefOutputs(const tensorflow::FunctionDef& fdef,
                         const std::vector<IOSpec>& outputs) {
    const OpDef& signature = fdef.signature();
    ASSERT_EQ(outputs.size(), signature.output_arg_size());