code: function add_group() {
      server.EntryGroupNew(function(err, path) {
        if (err) {
          sails.log.error('DBus: Could not call org.freedesktop.Avahi.Server.EntryGroupNew');
          return;
        }
        service.getInterface(
          path,
          avahi.DBUS_INTERFACE_ENTRY_GROUP.value,
          function (
            err,
            newGroup
          ) {
            group = newGroup;
            add_service();
          }
        )
      });
    }
docs: Add a new EntryGroup for our service.