{"ast_node_type":"function","tokens":[{"end":68,"kind":"keyword","start":0,"text":"//"}]}
            //   `for<'lt> [unsafe] [extern "ABI"] fn (&'lt S) -> T`
            // Function pointer type or bound list (trait object type) starting with a poly-trait.
            //   `for<'lt> Trait1<'lt> + Trait2 + 'a`