QList<QGraphicsItem *>items ( const QPolygonF & polygon, Qt::ItemSelectionMode mode, Qt::SortOrder order, const QTransform & deviceTransform = QTransform()) const is incorrect

when I use the Qt::ContainsItemShape mode to get items, the result is as same as using Qt::ContainsItemBoundingRect mode. And the QList<QGraphicsItem *> QGraphicsScene::items ( const QPainterPath & path, Qt::ItemSelectionMode mode, Qt::SortOrder order, const QTransform & deviceTransform = QTransform() ) const is also wrong with the mode.