code: def enable_hostgroup_host_notifications(self, hostgroup):
          
          for host_id in hostgroup.get_hosts():
              if host_id in self.daemon.hosts:
                  self.enable_host_notifications(self.daemon.hosts[host_id])
docs: Enable host notifications for a hostgroup
          Format of the line that triggers function call::
  
          ENABLE_HOSTGROUP_HOST_NOTIFICATIONS;<hostgroup_name>
  
          :param hostgroup: hostgroup to enable
          :type hostgroup: alignak.objects.hostgroup.Hostgroup
          :return: None