template<typename Ret>
    void register_sorting_option(const int col, std::function<Ret(int, int)> f)
    {
        set_column_order(col, {{
            [f](int lhs, int rhs) { return f(lhs) < f(rhs); },
            [f](int lhs, int rhs) { return f(lhs) > f(rhs); }
        }});
    }

    template<>
    void register_sorting_option(const int col, std::function<bool(int, int)> f)
    {
        set_column_order(col, {{
            [f](int lhs, int rhs) { return f(rhs, lhs); },
            [f](int lhs, int rhs) { return f(lhs, rhs); }
        }});
    }