{"ast_node_type":"other","tokens":[{"end":89,"kind":"keyword","start":0,"text":"poly_existential_predicates:"}]}
    poly_existential_predicates: InternedSet<'tcx, List<PolyExistentialPredicate<'tcx>>>,
    region: InternedSet<'tcx, RegionKind<'tcx>>,
    predicate: InternedSet<'tcx, WithCachedTypeInfo<ty::Binder<'tcx, PredicateKind<'tcx>>>>,