code: func (s *ReindexService) DestinationIndexAndType(index, typ string) *ReindexService {
  	if s.destination == nil {
  		s.destination = NewReindexDestination()
  	}
  	s.destination = s.destination.Index(index)
  	s.destination = s.destination.Type(typ)
  	return s
  }
docs: // DestinationIndexAndType specifies both the destination index and type
  // of the reindexing process.