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//! [0]
beginInsertRows(parent, 2, 4);
//! [0]


//! [1]
beginInsertRows(parent, 4, 5);
//! [1]


//! [2]
beginRemoveRows(parent, 2, 3);
//! [2]


//! [3]
beginInsertColumns(parent, 4, 6);
//! [3]


//! [4]
beginInsertColumns(parent, 6, 8);
//! [4]


//! [5]
beginRemoveColumns(parent, 4, 6);
//! [5]