size_t size() const { return this->contents_.size(); }
bool empty() const { return this->contents_.empty(); }
+ auto begin() const { return this->contents_.begin(); }
+ auto end() const { return this->contents_.end(); }
std::optional<aid_t> get_first_ssdpor_initial_from(EventHandle e, std::unordered_set<aid_t> disqualified) const;
std::unordered_set<aid_t> get_ssdpor_initials_from(EventHandle e, std::unordered_set<aid_t> disqualified) const;