{"ast_node_type":"variable","tokens":[{"end":88,"kind":"keyword","start":0,"text":"let"}]}
                let span = self.tcx.sess.source_map().guess_head_span(old_binding.span);
            (!old_binding.span.is_dummy() && old_binding.span != span).then(|| {
                match old_binding.is_import_user_facing() {