type dictionary {
    behave 4 dictionary@ f(int&in) { repeat { string, ? } };
    dictionary& opAssign(const dictionary &in);
    void set(const string &in, const ?&in);
    bool get(const string &in, ? &out) const;
    void set(const string &in, const int64&in);
    bool get(const string &in, int64 &out) const;
    void set(const string &in, const double&in);
    bool get(const string &in, double &out) const;
    bool exists(const string &in) const;
    bool isEmpty() const;
    uint getSize() const;
    bool delete(const string &in);
    void deleteAll();
    string[]@ getKeys() const;
    dictionaryValue& opIndex(const string &in);
    const dictionaryValue& opIndex(const string &in) const;
}