{"ast_node_type":"variable","tokens":[{"end":81,"kind":"keyword","start":0,"text":"let"}]}
                    let expr_id = self.with_label_rib(RibKind::Constant, |this| {
                if let Some(block) = const_block_pat.block_expr() {
                        let syntax_ptr = AstPtr::new(&block.clone().into());