{"ast_node_type":"other","tokens":[{"end":12,"kind":"keyword","start":0,"text":"///"}]}
    ///    |
    ///   --> $DIR/regions-creating-enums3.rs:17:5
    /// LL | fn mk_add_bad1<'a,'b>(x: &'a ast<'a>, y: &'b ast<'b>) -> ast<'a> {