{"ast_node_type":"other","tokens":[{"end":71,"kind":"keyword","start":0,"text":"ty::ExistentialPredicate::Trait(tr)"}]}
                ty::ExistentialPredicate::Trait(tr) => Some(tr.def_id),
            match predicate.skip_binder() {
                ty::ExistentialPredicate::AutoTrait(def_id) => Some(def_id),