public void eUnset( EStructuralFeature eFeature )
public void eUnset( int featureID )
	public void eUnset( EStructuralFeature eFeature )	{		switch ( eDerivedStructuralFeatureID( eFeature ) )		{			case DataPackage.NUMBER_DATA_ELEMENT__VALUE :				unsetValue( );				return;		}		eDynamicUnset( eFeature );	}