void serialize(Archiver& ar) {
std::map<std::string, std::string> sv;
std::map<std::string, double> nv;
if (ar.is_read) {
ar & NAMED_MEMBER("string_values", sv) & NAMED_MEMBER("num_values", nv);
string_values_ = sv_t(sv.begin(), sv.end());
num_values_ = nv_t(nv.begin(), nv.end());
} else {
sv.insert(string_values_.begin(), string_values_.end());
nv.insert(num_values_.begin(), num_values_.end());
ar & NAMED_MEMBER("string_values", sv) & NAMED_MEMBER("num_values", nv);
}
}
void serialize(Ar& ar) {
ar & NAMED_MEMBER("regularization_weight", C);
}