struct RealType {
      typedef tstring type;
    };

    template <typename T>
    struct RealType<T, false> {
      typedef T type;
    };
    // END_SKIP_DOXYGEN

    TensorProto AsTensorProto() {
      TensorProto tensor_proto;
      if (tensor.NumElements() > 1) {
        tensor.AsProtoTensorContent(&tensor_proto);
      } else {
        tensor.AsProtoField(&tensor_proto);
      }

string PrintTensorProto(const TensorProto& proto) {
  return strings::StrCat("Input::Initializer(", "{", PrintTensor(proto), "}, ",
                         PrintTensorShape(proto.tensor_shape()),
                         ").AsTensorProto()");
}

string PrintAttrValue(const string& op, const AttrValue& attr_value) {
  switch (attr_value.value_case()) {
    case AttrValue::kS:
      return PrintString(attr_value.s());
    case AttrValue::kI: