pub(crate) trait TextTrackListMethods<D: DomTypes> {
// Required methods
fn Length(&self) -> u32;
fn GetTrackById(&self, id: DOMString) -> Option<DomRoot<D::TextTrack>>;
fn GetOnchange(&self) -> Option<Rc<EventHandlerNonNull<D>>>;
fn SetOnchange(&self, value: Option<Rc<EventHandlerNonNull<D>>>);
fn GetOnaddtrack(&self) -> Option<Rc<EventHandlerNonNull<D>>>;
fn SetOnaddtrack(&self, value: Option<Rc<EventHandlerNonNull<D>>>);
fn GetOnremovetrack(&self) -> Option<Rc<EventHandlerNonNull<D>>>;
fn SetOnremovetrack(&self, value: Option<Rc<EventHandlerNonNull<D>>>);
fn IndexedGetter(&self, index: u32) -> Option<DomRoot<D::TextTrack>>;
}