{"ast_node_type":"other","tokens":[{"end":62,"kind":"keyword","start":0,"text":"(unstable,"}]}
    (unstable, cfg_target_thread_local, "1.7.0", Some(29594)),
    /// Allows `cfg(target_thread_local)`.
    /// Allows the use of `#[cfg(ub_checks)` to check if UB checks are enabled.