pub(crate) trait AudioScheduledSourceNodeMethods<D>where
    D: DomTypes,{
    // Required methods
    fn GetOnended(&self) -> Option<Rc<EventHandlerNonNull<D>>>;
    fn SetOnended(&self, value: Option<Rc<EventHandlerNonNull<D>>>);
    fn Start(&self, when: Finite<f64>) -> Result<(), Error>;
    fn Stop(&self, when: Finite<f64>) -> Result<(), Error>;
}