The description about sorting in Model/View Qt document maybe wrong?

In Qt document online Model/View Programming, it's said that If your model is sortable, i.e, if it reimplements the QAbstractItemModel::sort() function, both QTableView and QTreeView provide an API that allows you to sort your model data programmatically. In addition, you can enable interactive sorting (i.e. allowing the users to sort the data by clicking the view's headers), by connecting the QHeaderView::sortIndicatorChanged() signal to the QTableView::sortByColumn() slot or the QTreeView::sortByColumn() slot, respectively. However, firstly the QTableView::sortByColumn() is not a slot, so one cannot connect a signal to it; secondly, the code of QTableView::sortByColumn() is something like

d->header->setSortIndicator(column, order);
//If sorting is not enabled, force to sort now.
if (!d->sortingEnabled)
    d->model->sort(column, order);

and QHeaderView::setSortIndicator() function emit sortIndicatorChanged(logicalIndex, order). But if one uses function setSortingEnabled(true), the signal sortIndicatorChanged(logicalIndex, order) can also be emitted automatically by the view header when click the header column of the view.

So maybe the right way is to make a slot to receive the signal sortIndicatorChanged(logicalIndex, order) and in the slot, call the override virtual function sort() of the model?