@Test
public void testSummary() {

  Table summary = column.summary();
  assertEquals(2, summary.columnCount());
  assertEquals(2, summary.rowCount());
  assertEquals("false", summary.getUnformatted(0, 0));
  assertEquals("5.0", summary.getUnformatted(0, 1));
  assertEquals("true", summary.getUnformatted(1, 0));
  assertEquals("2.0", summary.getUnformatted(1, 1));
}