3D series types do not provide all QmlListProperty accessor functions for "seriesChildren" property

QQmlListProperty<QObject> QQuickGraphsBar3DSeries::seriesChildren()
{
    return QQmlListProperty<QObject>(this, this,
 &QQuickGraphsBar3DSeries::appendSeriesChildren,                    
 &QQuickGraphsBar3DSeries::countSeriesChildrenFunc,
 &QQuickGraphsBar3DSeries::atSeriesChildrenFunc,                                   
 &QQuickGraphsBar3DSeries::clearSeriesChildrenFunc);
}