switch ( eDerivedStructuralFeatureID( eFeature ) )
switch ( featureID )
	public boolean eIsSet( EStructuralFeature eFeature )	{		switch ( eDerivedStructuralFeatureID( eFeature ) )		{			case AttributePackage.IMAGE__TYPE :				return isSetType( );			case AttributePackage.IMAGE__URL :				return URL_EDEFAULT == null ? uRL != null						: !URL_EDEFAULT.equals( uRL );		}		return eDynamicIsSet( eFeature );	}