code: def linkify_es_by_h(self, hosts):
          
          for escal in self:
              # If no host, no hope of having a service
              if (not hasattr(escal, 'host_name') or escal.host_name.strip() == '' or
                      (hasattr(escal, 'service_description')
                       and escal.service_description.strip() != '')):
                  continue
              # I must be NOT a escalation on for service
              for hname in strip_and_uniq(escal.host_name.split(',')):
                  host = hosts.find_by_name(hname)
                  if host is not None:
                      host.escalations.append(escal.uuid)
docs: Add each escalation object into host.escalation attribute
  
          :param hosts: host list, used to look for a specific host
          :type hosts: alignak.objects.host.Hosts
          :return: None