docs: public NotificationChain basicSetRight(Expression newRight, NotificationChain msgs)
    {
      Expression oldRight = right;
      right = newRight;
      if (eNotificationRequired())
      {
        ENotificationImpl notification = new ENotificationImpl(this, Notification.SET, SimpleExpressionsPackage.OR_EXPRESSION__RIGHT, oldRight, newRight);
        if (msgs == null) msgs = notification; else msgs.add(notification);
      }
      return msgs;
    }