code: func (p *AWSSDProvider) serviceTypeFromEndpoint(ep *endpoint.Endpoint) string {
  	if ep.RecordType == endpoint.RecordTypeCNAME {
  		// FIXME service type is derived from the first target only. Theoretically this may be problem.
  		// But I don't see a scenario where one endpoint contains targets of different types.
  		if p.isAWSLoadBalancer(ep.Targets[0]) {
  			// ALIAS target uses DNS record type of A
  			return sd.RecordTypeA
  		}
  		return sd.RecordTypeCname
  	}
  	return sd.RecordTypeA
  }
docs: // determine service type (A, CNAME) from given endpoint