Schedule - Use of the ref object

All,

This might be a folish question, but I don't understand the use of the "refobject" in the schedule function.

Is it to be able to schedule function within a object namespace? not sure of this because I saw many times, schedule(XXX,0,%this.myfunc)

Is it to be able to call a function with a %This in argument and %this=refobject?

I try to have some answer on tdn, but the research have too many result.

Thanks for your help,