pub trait XRSystemMethods<D: DomTypes> {
// Required methods
fn IsSessionSupported(
&self,
realm: &mut CurrentRealm<'_>,
mode: XRSessionMode,
) -> <D::Promise as PromiseHelpers<D>>::StackRoot;
fn RequestSession(
&self,
realm: &mut CurrentRealm<'_>,
mode: XRSessionMode,
parameters: RootedTraceableBox<XRSessionInit>,
) -> <D::Promise as PromiseHelpers<D>>::StackRoot;
fn Test(&self, cx: &mut JSContext) -> DomRoot<D::XRTest>;
}