+ /**
+ * Updates the view properties of the current URL to the
+ * grouping given by \a role.
+ */
+ void setGroupRole(const QByteArray &role);
+ QByteArray groupRole() const;
+
+ /**
+ * Updates the view properties of the current URL to the
+ * sort order given by \a order.
+ */
+ void setGroupOrder(Qt::SortOrder order);
+ Qt::SortOrder groupOrder() const;
+