{"ast_node_type":"other","tokens":[{"end":91,"kind":"keyword","start":0,"text":"this.with_awaitable_block(Awaitable::No(\"constant"}]}
                        this.with_awaitable_block(Awaitable::No("constant block"), |this| {
                    self.with_label_rib(RibKind::Constant, |this| {
                            let (result_expr_id, prev_binding_owner) =