pub trait DOMHTMLOptionsCollectionExt: 'static {
fn length(&self) -> c_ulong;
fn selected_index(&self) -> c_long;
fn named_item(&self, name: &str) -> Option<DOMNode>;
fn set_selected_index(&self, value: c_long);
fn connect_selected_index_notify<F: Fn(&Self) + 'static>(
&self,
f: F
) -> SignalHandlerId;
}