code: @Override
  	public boolean eIsSet(int featureID)
  	{
  		switch (featureID)
  		{
  			case XbasePackage.XCLOSURE__DECLARED_FORMAL_PARAMETERS:
  				return declaredFormalParameters != null && !declaredFormalParameters.isEmpty();
  			case XbasePackage.XCLOSURE__EXPRESSION:
  				return expression != null;
  			case XbasePackage.XCLOSURE__EXPLICIT_SYNTAX:
  				return explicitSyntax != EXPLICIT_SYNTAX_EDEFAULT;
  			case XbasePackage.XCLOSURE__IMPLICIT_FORMAL_PARAMETERS:
  				return implicitFormalParameters != null && !implicitFormalParameters.isEmpty();
  		}
  		return super.eIsSet(featureID);
  	}
docs: <!-- begin-user-doc -->
  <!-- end-user-doc -->
  @generated