int columnCount(const QModelIndex &parent) const override;
QVariant data(const QModelIndex &parent, int role) const override;
QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const override;
int columnCount(const QModelIndex &parent) const override;
QVariant data(const QModelIndex &parent, int role) const override;
QVariant headerData(int section, Qt::Orientation orientation, int role = Qt::DisplayRole) const override;