@Override
public void onRequest() {
final PFlexTable flexTable1 = get("flexTable1");
final PLabel cell11 = get("cell11");
flexTable1.remove(cell11);
flexTable1.insertRow(0);
flexTable1.setWidget(0, 0, new PLabel("Cell_2_0"));
flexTable1.setWidget(0, 1, new PLabel("Cell_2_1"));
flexTable1.setWidget(3, 0, new PLabel("Cell_3_0"));
flexTable1.setWidget(3, 1, new PLabel("Cell_3_1"));
}