textvalue(section_id) {
		let cval = this.cfgvalue(section_id);

		if (cval == null)
			cval = this.default;

		return (cval == this.enabled) ? _('Yes') : _('No');
	}
Query the checked state of the underlying checkbox widget and return
either a localized `Yes` or `No` string, depending on the checked state.

@override