Function ComplexMapSerializable

test/serialization/test_map.cpp:71–71

} // namespace std
struct ComplexMapSerializable {
  ComplexMapSerializable() = default;
  ComplexMapSerializable(::std::mt19937_64& gen) {
    for (size_t i = 0; i < gen() % 10; ++i) {
      s.emplace(gen, gen);