{"ast_node_type":"other","tokens":[{"end":85,"kind":"keyword","start":0,"text":"ty::ClauseKind::Trait(ty::TraitPredicate"}]}
                    ty::ClauseKind::Trait(ty::TraitPredicate { trait_ref, polarity })
                let bound = poly_trait_ref.map_bound(|trait_ref| {
                });