@Test
public void column() {

  TableSlice slice = new TableSlice(source, Selection.withRange(0, 4));
  assertEquals(source.column(1).name(), slice.column(1).name());
  assertTrue(source.rowCount() > slice.column(1).size());
  assertEquals(source.column("date").name(), slice.column("date").name());
  assertTrue(source.rowCount() > slice.column("date").size());
  assertEquals(slice.column(1).size(), slice.column("date").size());
  assertEquals(4, slice.column("date").size());
}