Assert.assertNotNull(cs.getHiddenColumns());
List<int[]> hiddenCols = cs.getHiddenColumns();
Assert.assertEquals(hiddenCols.size(), TEST_CS_HEIGHT);
Assert.assertNotNull(cs.getHiddenColumns());
List<int[]> hiddenCols = cs.getHiddenColumns();
Assert.assertEquals(hiddenCols.size(), TEST_CS_HEIGHT);