Method constructor

github-actions/saucelabs/set-saucelabs-env.js:17005–17014

(type, eventInitDict)

          __privateSet(this, _eventInit, eventInitDict);
          webidl.util.markAsUncloneable(this);
        }
        get data() {
          webidl.brandCheck(this, _MessageEvent);
          return __privateGet(this, _eventInit).data;
        }
        get origin() {
          webidl.brandCheck(this, _MessageEvent);
          return __privateGet(this, _eventInit).origin;
        }
        get lastEventId() {
          webidl.brandCheck(this, _MessageEvent);
          return __privateGet(this, _eventInit).lastEventId;
        }