pub trait DOMHTMLOptGroupElementExt: 'static {
fn is_disabled(&self) -> bool;
fn label(&self) -> Option<GString>;
fn set_disabled(&self, value: bool);
fn set_label(&self, value: &str);
fn connect_disabled_notify<F: Fn(&Self) + 'static>(
&self,
f: F
) -> SignalHandlerId;
fn connect_label_notify<F: Fn(&Self) + 'static>(
&self,
f: F
) -> SignalHandlerId;
}