{"ast_node_type":"variable","tokens":[{"end":89,"kind":"keyword","start":0,"text":"let"}]}
                let pattern = make::tuple_struct_pat(path, iter::once(value_pat.into()));
                let value_pat = make::ext::simple_ident_pat(make::name("value"));
                let cond = make::expr_let(pattern.into(), call_expr);