Method columnCount

examples/NoValues/mainwindow.cpp:40–45

    }

    int columnCount(const QModelIndex &parent = QModelIndex()) const override
    {
        Q_UNUSED(parent);
        // qDebug() << "EmptyModel::columnCount(...)";
        return 0;
    }

    int rowCount(const QModelIndex &parent = QModelIndex()) const override
    {