{"ast_node_type":"other","tokens":[{"end":56,"kind":"keyword","start":0,"text":"(accepted,"}]}
    (accepted, non_ascii_idents, "1.53.0", Some(55467)),
    /// Allows defining identifiers beyond ASCII.
    /// Allows future-proofing enums/structs with the `#[non_exhaustive]` attribute (RFC 2008).