Method size

tests/test_sequences_and_iterators.cpp:340–340

        void set(const std::string &key, std::string val) { map[key] = std::move(val); }
        std::string get(const std::string &key) const { return map.at(key); }
        size_t size() const { return map.size(); }

    private:
        std::unordered_map<std::string, std::string> map;