{"ast_node_type":"other","tokens":[{"end":68,"kind":"keyword","start":0,"text":"ty::ExistentialPredicate::AutoTrait(def_id)"}]}
                    ty::ExistentialPredicate::AutoTrait(def_id) => {
                    // Check that b_ty's auto traits are present in a_ty's bounds.
                        if !a_auto_traits.contains(&def_id) {