iwmlib/lib/3rdparty/systemjs/babel-helpers/defineEnumerableProperties.js

export default (function (obj, descs) {
  for (var key in descs) {
    var desc = descs[key];
    desc.configurable = desc.enumerable = true;
    if ("value" in desc) desc.writable = true;
    Object.defineProperty(obj, key, desc);
  }

  return obj;
});