def restart(self, restart_only_stale_services=None,
    redeploy_client_configuration=None,
    restart_service_names=None):
    """
    Restart all services in the cluster.
    Services are restarted in the appropriate order given their dependencies.

    @param restart_only_stale_services: Only restart services that have stale
                                        configuration and their dependent
                                        services. Default is False.
    @param redeploy_client_configuration: Re-deploy client configuration for
                                          all services in the cluster. Default
                                          is False.
    @param restart_service_names: Only restart services that are specified and their dependent services.
                                  Available since API v11.
    @since API v6

    @return: Reference to the submitted command.
    """
    if self._get_resource_root().version < 6:
      return self._cmd('restart')
    else:
      args = dict()
      args['restartOnlyStaleServices'] = restart_only_stale_services
      args['redeployClientConfiguration'] = redeploy_client_configuration
      if self._get_resource_root().version >= 11:
        args['restartServiceNames'] = restart_service_names
      return self._cmd('restart', data=args, api_version=6)
Restart all services in the cluster.
    Services are restarted in the appropriate order given their dependencies.

    @param restart_only_stale_services: Only restart services that have stale
                                        configuration and their dependent
                                        services. Default is False.
    @param redeploy_client_configuration: Re-deploy client configuration for
                                          all services in the cluster. Default
                                          is False.
    @param restart_service_names: Only restart services that are specified and their dependent services.
                                  Available since API v11.
    @since API v6

    @return: Reference to the submitted command.