{"ast_node_type":"other","tokens":[{"end":53,"kind":"keyword","start":0,"text":"//"}]}
            //   `for<'lt> Trait1<'lt> + Trait2 + 'a`
            //   `for<'lt> [unsafe] [extern "ABI"] fn (&'lt S) -> T`
            let (lifetime_defs, _) = self.parse_late_bound_lifetime_defs()?;