remove item from `gcheckcombobox`

Question

I have created a gcheckcomboboxwith the items to be displayes in printable:

object <- gcheckboxgroup(printable, container=win,use.table=TRUE)

and I want to delete the values selected by the user after clicking on a button :

addHandlerClicked(obj2,handler = function(h,...){
savable<-svalue(object)

#tried something like this, didn't work
enabled(svalue(object))<<-FALSE

})

I tried to "disable" the values I selected but did not work.

Thanks for help