public boolean eIsSet( EStructuralFeature eFeature )
public boolean eIsSet( int featureID )
	public boolean eIsSet( EStructuralFeature eFeature )	{		switch ( eDerivedStructuralFeatureID( eFeature ) )		{			case LayoutPackage.CLIENT_AREA__BACKGROUND :				return background != null;			case LayoutPackage.CLIENT_AREA__OUTLINE :				return outline != null;			case LayoutPackage.CLIENT_AREA__SHADOW_COLOR :				return shadowColor != null;			case LayoutPackage.CLIENT_AREA__INSETS :				return insets != null;		}		return eDynamicIsSet( eFeature );	}