{"ast_node_type":"other","tokens":[{"end":95,"kind":"keyword","start":0,"text":"//"}]}
            // Note that if a non-exhaustive SingleVariant is defined in another crate, we need
        if let ty::Adt(def, _) = self.cx.structurally_resolve_type(span, ty).kind() {
            // to assume that more cases will be added to the variant in the future. This mean