How to get the index of the sourceModel of QSortFilterProxyModel

[Infinity]

How can I get the index of the sourceModel of a QSortFilterProxyModel()? I have a QSortFilterProxyModel as the model in a tableView. The selectionChanged singal of the tableView is connected to on_selectionChanged. In on_selectionChanged selected contains the index of the QSortFilterProxyModel. How can I get the index of the sourceModel which corresponds to the index of the QSortFilterProxyModel?

I have something like this:

// Get the filter model
m_accountFilterModel = m_accountModel->accountFilterModel();

// m_accountFilterModel is a QSortFilterProxyModel
m_ui->tableViewApprovals->setModel(m_accountFilterModel());

connect(m_ui->tableViewApprovals->selectionModel(), &QItemSelectionModel::selectionChanged,  this, &WidgetApprovalAccount::on_selectionChanged);
.
.
.
void WidgetApprovalAccount::on_selectionChanged(const QItemSelection &selected, const QItemSelection &deselected)
{
    Q_UNUSED(deselected)

    // How can I get the QItemSelection of m_accountModel here?
}

[JonB]

@Infinity
QModelIndex QSortFilterProxyModel::mapToSource(const QModelIndex &proxyIndex) const , https://doc.qt.io/qt-5/qsortfilterproxymodel.html#mapToSource

Returns the source model index corresponding to the given proxyIndex from the sorting filter model.

Also seeQItemSelection QSortFilterProxyModel::mapSelectionToSource(const QItemSelection &proxySelection) const, https://doc.qt.io/qt-5/qsortfilterproxymodel.html#mapSelectionFromSource

Returns a source selection mapped from the specified proxySelection.

[Infinity]

@JonB Awesome! Thanks. That is what I was looking for.