Method insert

src/ifcparse/map_transformer.h:113–116

@todo still not sure if this is a good idea, do we want to insert into the transformed map?

    // @todo still not sure if this is a good idea, do we want to insert into the transformed map?
    std::pair<iterator, bool> insert(const value_type& val) {
        auto p = base_map_->insert({ val.first, transform_back_(val.second) });
        return { iterator(p.first, &transform_), p.second };
    }

    size_t erase(const key_type& key) {
        return base_map_->erase(key);