code: func (s *Sheet) RemoveRowAtIndex(index int) error {
  	if index < 0 || index >= len(s.Rows) {
  		return errors.New("RemoveRowAtIndex: index out of bounds")
  	}
  	s.Rows = append(s.Rows[:index], s.Rows[index+1:]...)
  	return nil
  }
docs: // Removes a row at a specific index