code: def apply_dependencies(self, hosts):
          
          for service in self:
              if service.host and service.host_dependency_enabled:
                  host = hosts[service.host]
                  if host.active_checks_enabled:
                      service.act_depend_of.append(
                          (service.host, ['d', 'x', 's', 'f'], '', True)
                      )
                      host.act_depend_of_me.append(
                          (service.uuid, ['d', 'x', 's', 'f'], '', True)
                      )
                      host.child_dependencies.add(service.uuid)
                      service.parent_dependencies.add(service.host)
docs: Wrapper to loop over services and call Service.fill_daddy_dependency()
  
          :return: None