code: func (s *Spinner) Reverse() {
  	s.lock.Lock()
  	defer s.lock.Unlock()
  	for i, j := 0, len(s.chars)-1; i < j; i, j = i+1, j-1 {
  		s.chars[i], s.chars[j] = s.chars[j], s.chars[i]
  	}
  }
docs: // Reverse will reverse the order of the slice assigned to the indicator