{"ast_node_type":"other","tokens":[{"end":87,"kind":"keyword","start":0,"text":"predefined_opaques_in_body:"}]}
    predefined_opaques_in_body: InternedSet<'tcx, PredefinedOpaquesData<TyCtxt<'tcx>>>,
    external_constraints: InternedSet<'tcx, ExternalConstraintsData<TyCtxt<'tcx>>>,
    fields: InternedSet<'tcx, List<FieldIdx>>,