virtual bool setData(const QModelIndex &index, const QVariant &value, int role);
virtual bool insertRows(int row, int count, const QModelIndex &parent);
virtual bool removeRows(int row, int count, const QModelIndex &parent);
virtual bool setData(const QModelIndex &index, const QVariant &value, int role);
virtual bool insertRows(int row, int count, const QModelIndex &parent);
virtual bool removeRows(int row, int count, const QModelIndex &parent);