{"ast_node_type":"variable","tokens":[{"end":67,"kind":"keyword","start":0,"text":"if"}]}
                if let Some(block) = const_block_pat.block_expr() {
            ast::Pat::ConstBlockPat(const_block_pat) => {
                    let expr_id = self.with_label_rib(RibKind::Constant, |this| {