{"ast_node_type":"other","tokens":[{"end":66,"kind":"keyword","start":0,"text":"self.with_label_rib(RibKind::Closure,"}]}
                    self.with_label_rib(RibKind::Closure, |this| {
                Some(ast::BlockModifier::Async(_)) => {
                        this.with_awaitable_block(Awaitable::Yes, |this| {