@Test
public void removeSort() {

  Selection selection = Selection.withRange(0, 5);
  TableSlice tableSlice = new TableSlice(source, selection);
  tableSlice.sortOn(Sort.on("approval", Order.ASCEND));
  tableSlice.removeSort();
  double[] expected = new double[] {53.0, 53.0, 58.0, 52.0, 52.0};
  double[] actual = ((IntColumn) tableSlice.column("approval")).asDoubleArray();
  assertArrayEquals(expected, actual);
}