[Freeswitch-users] how to DISABLE events by class or all

it's said at http://wiki.freeswitch.org/wiki/Mod_event_socket that "event" command is to Enable or disable events by class or all (plain or xml or json output format) usage is: event plain <list of events to log or all for all> but i didn't see any description on how to DISABLE events by class or all, how can this be done? (noevents will disable all events, but i just want to disable a certain type of events that had been previously subscribed.) BR