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//! [0]
QAbstractItemModel *model = index.model();
//! [0]
//! [1]
QModelIndex index = model->index(row, column, ...);
//! [1]
//! [2]
QModelIndex indexA = model->index(0, 0, QModelIndex());
QModelIndex indexB = model->index(1, 1, QModelIndex());
QModelIndex indexC = model->index(2, 1, QModelIndex());
//! [2]
//! [3]
QModelIndex index = model->index(row, column, parent);
//! [3]
//! [4]
QModelIndex indexA = model->index(0, 0, QModelIndex());
QModelIndex indexC = model->index(2, 1, QModelIndex());
//! [4]
//! [5]
QModelIndex indexB = model->index(1, 0, indexA);
//! [5]
//! [6]
QVariant value = model->data(index, role);
//! [6]
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