{"ast_node_type":"impl","tokens":[{"end":90,"kind":"keyword","start":0,"text":"//"}]}
            // Reject cases like `<impl Trait>::Assoc` and `<impl Trait as Trait>::Assoc`.
            .as_ref()
            .map(|q| self.lower_ty(&q.ty, ImplTraitContext::Disallowed(ImplTraitPosition::Path)));