in hessian2/basic_codec/map_codec.cc [115:127]
bool Encoder::encode(const UntypedMapObject& value) {
values_ref_.emplace(&value, values_ref_.size());
auto untyped_map = value.toUntypedMap();
ABSL_ASSERT(untyped_map.has_value());
auto& untyped_map_value = untyped_map.value().get();
writer_->writeByte('H');
for (const auto& elem : untyped_map_value) {
encode<Object>(*elem.first);
encode<Object>(*elem.second);
}
writer_->writeByte('Z');
return true;
}