func (s *Set) Contains(value interface{}) bool {
	s.RLock()
	defer s.RUnlock()
	_, ok := s.m[value]
	return ok
}
func (s *Set) Contains(value interface{}) bool {
	s.RLock()
	defer s.RUnlock()
	_, ok := s.m[value]
	return ok
}
func ( s * Set ) Contains ( value interface { } ) bool { s . RLock ( ) defer s . RUnlock ( ) _ , ok := s . m [ value ] return ok }
// Contains check if value exists in the set.
Contains check if value exists in the set .