Reason BS labeled default args

test.re

type options = {
  .
  "dir": string,
  "key": string
};

let defaultOptions: options = {"dir": "conf/", "key": "configuration"};

let createConf = (~opts=defaultOptions, ()) => Js.log(opts);


/*
// Generated by BUCKLESCRIPT VERSION 2.2.3, PLEASE EDIT WITH CARE
'use strict';


var defaultOptions = {
  dir: "conf/",
  key: "configuration"
};

function createConf($staropt$star, _) {
  var opts = $staropt$star ? $staropt$star[0] : defaultOptions;
  console.log(opts);
  return /* () */0;
}

exports.defaultOptions = defaultOptions;
exports.createConf = createConf;
/* No side effect */

*/