{"ast_node_type":"variable","tokens":[{"end":64,"kind":"keyword","start":0,"text":"let"}]}
        let instructions = self.counter.as_mut().and_then(|it| {
        #[cfg(all(target_os = "linux", not(target_env = "ohos")))]
            it.read().map_err(|err| eprintln!("Failed to read perf counter: {err}")).ok()