{"ast_node_type":"other","tokens":[{"end":67,"kind":"keyword","start":0,"text":"(unstable,"}]}
    (unstable, type_changing_struct_update, "1.58.0", Some(86555)),
    /// not changed from prior instances of the same struct (RFC #2528)
    /// Allows using `unsafe<'a> &'a T` unsafe binder types.