{
    EGenericType oldELowerBound = eLowerBound;
    eLowerBound = newELowerBound;
    if (eNotificationRequired())
    {
      ENotificationImpl notification = new ENotificationImpl(this, Notification.SET, EcorePackage.EGENERIC_TYPE__ELOWER_BOUND, oldELowerBound, newELowerBound);
      if (msgs == null) msgs = notification; else msgs.add(notification);
    }
    return msgs;
  }