{"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":"(unstable,"}]}
    (unstable, impl_trait_in_bindings, "1.64.0", Some(63065)),
    /// Allows `impl Trait` in bindings (`let`).
    /// Allows `impl Trait` as output type in `Fn` traits in return position of functions.