method declared in struct in C++ (STL)

template<typename R, typename... Args>
class method {
public:
    using pointer_to_member_function = R(T::*)(Args...);

    method(pointer_to_member_function pmf) : pmf_(pmf) {}

    R operator()(T& obj, Args... args) const {
        return (obj.*pmf_)(args...);
    }

private:
    pointer_to_member_function pmf_;
};

struct MyStruct {
    int myMethod(int a, int b) {
        return a + b;
    }
};

int main() {
    MyStruct obj;
    method<int, int, int> myMethod(&MyStruct::myMethod);
    int result = myMethod(obj, 1, 2);
    return 0;
}