def row_icon(self, gtkIcon = gtk.STOCK_ABOUT):
        try:
            # Updates gtk_list store, set icon in current display.
            # Since it is used by bookmarks, would be reshown with next display() anyhow,
            # and there's no need to invalidate the ls cache, because that's referenced by model anyhow.
            (model,iter) = self.model_iter()
            model.set_value(iter, 0, gtkIcon)
        except Exception as e:
            log.ERR_UIKIT("Couldn't set row_icon()", e)

    

    #------------------------ base implementations -----------------------------

    # read previous channel/stream data, if there is any
    def cache(self):