- QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const override;
- QModelIndex parent(const QModelIndex &child) const override;
- int columnCount(const QModelIndex &parent = QModelIndex()) const override;
- int rowCount(const QModelIndex &parent = QModelIndex()) const override;
+ QModelIndex index(int row, int column, const QModelIndex& parent = QModelIndex()) const override;
+ QModelIndex parent(const QModelIndex& child) const override;
+ int columnCount(const QModelIndex& parent = QModelIndex()) const override;
+ int rowCount(const QModelIndex& parent = QModelIndex()) const override;