{"ast_node_type":"other","tokens":[{"end":51,"kind":"keyword","start":0,"text":"walk_expr(&body_expr,"}]}
                walk_expr(&body_expr, &mut |expr| {
                let tail_cb = &mut |e: &_| tail_cb_impl(&mut exprs_to_wrap, e);
                    if let Expr::ReturnExpr(ret_expr) = expr {