{"ast_node_type":"impl","tokens":[{"end":90,"kind":"keyword","start":0,"text":"///"}]}
    /// Allows `impl Trait` as output type in `Fn` traits in return position of functions.
    (unstable, impl_trait_in_bindings, "1.64.0", Some(63065)),
    (unstable, impl_trait_in_fn_trait_return, "1.64.0", Some(99697)),