class foo public void reset a0 clear a1 clear private std set int a0 a

class foo {
 public:
	void reset() {
		a0.clear();
		a1.clear();
 	}
 private:
	std::set<int> a0, a1;
	std::set<int> b0;
};


// |||||||||||||
// vvvvvvvvvvvvv
class reflefoo {
 public:
    void reset() {
        // resets a0, a1 and a2. b0 is untouched
		for (auto col : reflefoo::some_group_id)
        	col.reset(); 
    }
 private:
    some_group_id { std::set<int> a0, a1, a2; }
    std::set<int> b0;
};