switch ( eDerivedStructuralFeatureID( eFeature ) )
switch ( featureID )
	public boolean eIsSet( EStructuralFeature eFeature )	{		switch ( eDerivedStructuralFeatureID( eFeature ) )		{			case AttributePackage.LINE_ATTRIBUTES__STYLE :				return isSetStyle( );			case AttributePackage.LINE_ATTRIBUTES__THICKNESS :				return isSetThickness( );			case AttributePackage.LINE_ATTRIBUTES__COLOR :				return color != null;			case AttributePackage.LINE_ATTRIBUTES__VISIBLE :				return isSetVisible( );		}		return eDynamicIsSet( eFeature );	}