pub(crate) trait FontFaceSetMethods<D: DomTypes> {
// Required methods
fn Add(&self, font: &D::FontFace) -> DomRoot<D::FontFaceSet>;
fn Load(
&self,
font: DOMString,
text: DOMString,
_can_gc: CanGc,
) -> Rc<D::Promise>;
fn Ready(&self) -> Rc<D::Promise>;
}