{"ast_node_type":"variable","tokens":[{"end":87,"kind":"keyword","start":0,"text":"let"}]}
                    let value_pat = make::ext::simple_ident_pat(make::name(some_name));
                    let path = make::ext::ident_path("Some");
                    let pat = make::tuple_struct_pat(path, iter::once(value_pat.into()));