def enable_hostgroup_passive_svc_checks(self, hostgroup):
        """Enable service passive checks for a hostgroup
        Format of the line that triggers function call::

        ENABLE_HOSTGROUP_PASSIVE_SVC_CHECKS;<hostgroup_name>

        :param hostgroup: hostgroup to enable
        :type hostgroup: alignak.objects.hostgroup.Hostgroup
        :return: None
        """
        for host_id in hostgroup.get_hosts():
            if host_id in self.daemon.hosts:
                for service_id in self.daemon.hosts[host_id].services:
                    if service_id in self.daemon.services:
                        self.enable_passive_svc_checks(self.daemon.services[service_id])