harness.check(m.getMinSelectionIndex(), 3);
harness.check(lastEvent.getSource(), m);
harness.check(lastEvent.getFirstIndex(), 3);
harness.check(lastEvent.getLastIndex(), 3);
m.clearSelection();
m.addSelectionInterval(3, 1);
harness.check(m.isSelectedIndex(0), false);
harness.check(m.isSelectedIndex(1), true);
harness.check(m.isSelectedIndex(2), false);
harness.check(m.isSelectedIndex(3), false);