public boolean eIsSet( EStructuralFeature eFeature )
public boolean eIsSet( int featureID )
	public boolean eIsSet( EStructuralFeature eFeature )	{		switch ( eDerivedStructuralFeatureID( eFeature ) )		{			case DataPackage.SERIES_GROUPING__ENABLED :				return isSetEnabled( );			case DataPackage.SERIES_GROUPING__GROUPING_UNIT :				return isSetGroupingUnit( );			case DataPackage.SERIES_GROUPING__GROUPING_ORIGIN :				return groupingOrigin != null;			case DataPackage.SERIES_GROUPING__GROUPING_INTERVAL :				return isSetGroupingInterval( );			case DataPackage.SERIES_GROUPING__GROUP_TYPE :				return isSetGroupType( );			case DataPackage.SERIES_GROUPING__AGGREGATE_EXPRESSION :				return AGGREGATE_EXPRESSION_EDEFAULT == null ? aggregateExpression != null						: !AGGREGATE_EXPRESSION_EDEFAULT.equals( aggregateExpression );		}		return eDynamicIsSet( eFeature );	}