{"ast_node_type":"variable","tokens":[{"end":81,"kind":"keyword","start":0,"text":"if"}]}
            if let ty::PredicateKind::Clause(ty::ClauseKind::Trait(trait_pred)) =
        let is_iterator_predicate = |predicate: ty::Predicate<'tcx>| -> bool {
                predicate.kind().as_ref().skip_binder()