{"ast_node_type":"variable","tokens":[{"end":97,"kind":"keyword","start":0,"text":"let"}]}
        let mut spans: MultiSpan = if let Some(def_span) = self.tcx.def_ident_span(self.def_id) {
    fn show_definition(&self, err: &mut Diag<'_, impl EmissionGuarantee>) {
            if self.tcx.sess.source_map().is_span_accessible(def_span) {