test_walk_on_new_event_no_gevent fails
https://gitlab.esrf.fr/bliss/bliss/-/jobs/511848
The walk API has a mechanism to report it started walking. Expose that from RemoteNodeWalker
https://gitlab.esrf.fr/bliss/bliss/-/jobs/511848
The walk API has a mechanism to report it started walking. Expose that from RemoteNodeWalker