virtual KItemListGroupHeaderCreatorBase* defaultGroupHeaderCreator() const;
virtual void initializeItemListWidget(KItemListWidget* item);
virtual bool itemSizeHintUpdateRequired(const QSet<QByteArray>& changedRoles) const;
+ virtual bool itemLayoutSupportsItemExpanding(ItemLayout layout) const;
virtual void onItemLayoutChanged(ItemLayout current, ItemLayout previous);
virtual void onScrollOrientationChanged(Qt::Orientation current, Qt::Orientation previous);
virtual void onSupportsItemExpandingChanged(bool supportsExpanding);