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

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class foo {
public:
void reset() {
a0.clear();
a1.clear();
}
private:
std::set<int> a0, a1;
std::set<int> b;
};
// |||||||||||||
// vvvvvvvvvvvvv
class reflefoo {
public:
void reset() {
for (auto col : reflefoo::some_group_id)
col.reset();
}
private:
some_group_id { std::set<int> s0, s1; }
std::set<int> b;
};