{"ast_node_type":"variable","tokens":[{"end":32,"kind":"keyword","start":0,"text":"let"}]}
        let message_and_format =
    pub fn verbose_generic_activity(&self, event_label: &'static str) -> VerboseTimingGuard<'_> {
            self.print_verbose_generic_activities.map(|format| (event_label.to_owned(), format));