bool is_subset_of(const EventSet&) const;
bool operator==(const EventSet& other) const { return this->events_ == other.events_; }
bool operator!=(const EventSet& other) const { return this->events_ != other.events_; }
bool is_subset_of(const EventSet&) const;
bool operator==(const EventSet& other) const { return this->events_ == other.events_; }
bool operator!=(const EventSet& other) const { return this->events_ != other.events_; }