Qt
3
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QTreeWidgetItem* top_level = new QTreeWidgetItem(m_three);
QTreeWidgetItem* child_item = new QTreeWidgetItem(top_level);
QStandardItemModel model(rows, columns);
QStandardItem *item = new QStandardItem("top");
QStandardItem *child = new QStandardItem("child");
model.setItem(row, column, item);