code: @Override
  	public boolean eIsSet(int featureID) {
  		switch (featureID) {
  			case XtextPackage.NAMED_ARGUMENT__PARAMETER:
  				return parameter != null;
  			case XtextPackage.NAMED_ARGUMENT__VALUE:
  				return value != null;
  			case XtextPackage.NAMED_ARGUMENT__CALLED_BY_NAME:
  				return calledByName != CALLED_BY_NAME_EDEFAULT;
  		}
  		return super.eIsSet(featureID);
  	}
docs: <!-- begin-user-doc -->
  <!-- end-user-doc -->
  @generated