{"ast_node_type":"other","tokens":[{"end":99,"kind":"keyword","start":0,"text":"WherePredicateKind::RegionPredicate(rp)"}]}
            WherePredicateKind::RegionPredicate(rp) if rp.is_param_bound(param_def_id) => Some(rp),
        self.predicates.iter().filter_map(move |pred| match pred.kind {
            _ => None,