{"ast_node_type":"variable","tokens":[{"end":64,"kind":"keyword","start":0,"text":"let"}]}
        let target = target_from_impl_item(self.tcx, impl_item);
    fn visit_impl_item(&mut self, impl_item: &'tcx hir::ImplItem<'tcx>) {
        self.check_attributes(impl_item.hir_id(), impl_item.span, target, None);