Method Adorn

parser/parser_test.cc:1388–1390

      : source_info_(source_info) {}

  std::string Adorn(const cel::Expr& e) const override {
    return LocationToString(e.id());
  }

  std::string AdornStructField(const cel::StructExprField& e) const override {
    return LocationToString(e.id());