addFeature and removeFeature APIs in lib-jitsi-meet

May I know what are these two APIs

Adds a feature(uses presence of participants) and the remote participants can be checking for existence of this feature.

Thank you very much Damencho for your quick response. May I know how other user will check for this feature? For example participant A calls addFeature() API

connection.addFeature("Hello", true);

Now how any other remote user B will check if user A has published “Hello”?

I’m sorry if I’m being stupid here but its not clear how this feature will be accessible to other participants.

conference.getParticipantById(participantB_id).getFeatures().then(f → f.contains(“Hello”));

Something like this

Thanks a lot Damencho. Let me check how we can make use of this functionality.