switch ( eDerivedStructuralFeatureID( eFeature ) )
switch ( featureID )
	public void eUnset( EStructuralFeature eFeature )	{		switch ( eDerivedStructuralFeatureID( eFeature ) )		{			case ComponentPackage.CHART_PREFERENCES__LABELS :				getLabels( ).clear( );				return;			case ComponentPackage.CHART_PREFERENCES__BLOCKS :				getBlocks( ).clear( );				return;		}		eDynamicUnset( eFeature );	}