pub(crate) trait ServiceWorkerGlobalScopeMethods<D: DomTypes> {
// Required methods
fn GetOnmessage(&self) -> Option<Rc<EventHandlerNonNull<D>>>;
fn SetOnmessage(&self, value: Option<Rc<EventHandlerNonNull<D>>>);
fn GetOnmessageerror(&self) -> Option<Rc<EventHandlerNonNull<D>>>;
fn SetOnmessageerror(&self, value: Option<Rc<EventHandlerNonNull<D>>>);
}