docs: @Override
  	public boolean eIsSet(int featureID) {
  		switch (featureID) {
  			case XtextPackage.CROSS_REFERENCE__TYPE:
  				return type != null;
  			case XtextPackage.CROSS_REFERENCE__TERMINAL:
  				return terminal != null;
  		}
  		return super.eIsSet(featureID);
  	}