@Test
public void testIsRowAvailable() {

    arrangeableModel.setRowKey(null);
    Assert.assertFalse(extendedDataModel.isRowAvailable());
    arrangeableModel.setRowKey(ROW_KEY);
    Assert.assertTrue(extendedDataModel.isRowAvailable());
    arrangeableModel.setRowKey(extendedDataModel.getRowCount());
    Assert.assertFalse(extendedDataModel.isRowAvailable());
}