{"ast_node_type":"variable","tokens":[{"end":99,"kind":"keyword","start":0,"text":"let"}]}
                        let bs: SmallVec<[String; 2]> = bs.iter().map(|r| r.to_string()).collect();
                    SuggestedConstraint::Outlives(a, bs) => {
                        diag.help(format!("add bound `{a}: {}`", bs.join(" + ")));