QModelIndex index(int row, int column, const QModelIndex &parent = QModelIndex()) const override;
- inline QModelIndex parent(const QModelIndex &) const override { return QModelIndex(); }
+ inline QModelIndex parent(const QModelIndex &) const override { return {}; }
inline int rowCount(const QModelIndex &parent = QModelIndex()) const override;
inline int columnCount(const QModelIndex &parent = QModelIndex()) const override;