Method exists

structure/set.go:443–450

(member ...string)

	return zSet.exists(member...)
}
func (s *FSets) exists(member ...string) bool {
	for _, s2 := range member {
		if _, ok := (*s)[s2]; !ok {
			return false
		}
	}
	return true
}

func (s *SetStructure) Stop() error {
	err := s.db.Close()