code: func filterAndFixLinks(links []string, filter DomainFilter) []string {
  	var result []string
  	for _, link := range links {
  
  		// link looks like /REST/CNAMERecord/acme.com/exchange.acme.com/349386875
  
  		// strip /REST/
  		link = strings.TrimPrefix(link, restAPIPrefix)
  
  		// simply ignore all record types we don't care about
  		if !strings.HasPrefix(link, endpoint.RecordTypeA) &&
  			!strings.HasPrefix(link, endpoint.RecordTypeCNAME) &&
  			!strings.HasPrefix(link, endpoint.RecordTypeTXT) {
  			continue
  		}
  
  		// strip ID suffix
  		domain := link[0:strings.LastIndexByte(link, '/')]
  		// strip zone prefix
  		domain = domain[strings.LastIndexByte(domain, '/')+1:]
  		if filter.Match(domain) {
  			result = append(result, link)
  		}
  	}
  
  	return result
  }
docs: // filterAndFixLinks removes from `links` all the records we don't care about
  // and strops the /REST/ prefix