docs: public NotificationChain basicSetLiteral(Keyword newLiteral, NotificationChain msgs) {
  		Keyword oldLiteral = literal;
  		literal = newLiteral;
  		if (eNotificationRequired()) {
  			ENotificationImpl notification = new ENotificationImpl(this, Notification.SET, XtextPackage.ENUM_LITERAL_DECLARATION__LITERAL, oldLiteral, newLiteral);
  			if (msgs == null) msgs = notification; else msgs.add(notification);
  		}
  		return msgs;
  	}