strings::StrAppend(out, ", ", attr.name());
                          }
                        })));

  string fuzz_impl_signature_str = absl::Substitute(
      "  void FuzzImpl($0) final {\n",
      absl::StrJoin(
          op_info.graph_op_def.input_arg(), ", ",
          [](string* out, const auto arg) {
            strings::StrAppend(out, "const Tensor& ", arg.name(), "_0");