assertEquals("Last row cannot be validated.", 2, model.getValidatedRowCount());
assertEquals("Row-0 size is 10000.", 10000, model.getPreferredRowSize(0));
assertEquals("Row-1 size is 20000.", 20000, model.getPreferredRowSize(1));
assertEquals("Row-2 size is 10000.", 10000, model.getPreferredRowSize(2));
model.addRow();
model.addRow();
model.updateDefinedSize(3, 1, 10000);
model.updateDefinedSize(4, 1, 10000);
model.validatePreferredSizes();