code: def linkify_servicegroups_services(self, hosts, services):
          
          for servicegroup in self:
              mbrs = servicegroup.get_services()
              # The new member list, in id
              new_mbrs = []
              seek = 0
              host_name = ''
              if len(mbrs) == 1 and mbrs[0] != '':
                  servicegroup.add_unknown_members('%s' % mbrs[0])
  
              for mbr in mbrs:
                  if not mbr:
                      continue
                  if seek % 2 == 0:
                      host_name = mbr.strip()
                  else:
                      service_desc = mbr.strip()
                      find = services.find_srv_by_name_and_hostname(host_name, service_desc)
                      if find is not None:
                          new_mbrs.append(find.uuid)
                      else:
                          host = hosts.find_by_name(host_name)
                          if not (host and host.is_excluded_for_sdesc(service_desc)):
                              servicegroup.add_unknown_members('%s,%s' % (host_name, service_desc))
                          elif host:
                              self.add_warning('servicegroup %r : %s is excluded from the '
                                               'services of the host %s'
                                               % (servicegroup, service_desc, host_name))
                  seek += 1
  
              # Make members uniq
              new_mbrs = list(set(new_mbrs))
  
              # We find the id, we replace the names
              servicegroup.replace_members(new_mbrs)
              for srv_id in servicegroup.members:
                  serv = services[srv_id]
                  serv.servicegroups.append(servicegroup.uuid)
                  # and make this uniq
                  serv.servicegroups = list(set(serv.servicegroups))
docs: We just search for each host the id of the host
          and replace the name by the id
          TODO: very slow for high services, so search with host list,
          not service one
  
          :param hosts: hosts object
          :type hosts: alignak.objects.host.Hosts
          :param services: services object
          :type services: alignak.objects.service.Services
          :return: None