function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; } export default class A { constructor() { _defineProperty(this, "handle", value => { var _ref = {}; value = _ref.value; }); } }