switch ( eDerivedStructuralFeatureID( eFeature ) )
switch ( featureID )
	public boolean eIsSet( EStructuralFeature eFeature )	{		switch ( eDerivedStructuralFeatureID( eFeature ) )		{			case AttributePackage.SIZE__HEIGHT :				return isSetHeight( );			case AttributePackage.SIZE__WIDTH :				return isSetWidth( );		}		return eDynamicIsSet( eFeature );	}