@Test
void testRemoveColumns() {

  StringColumn sc = StringColumn.create("0");
  StringColumn sc1 = StringColumn.create("1");
  StringColumn sc2 = StringColumn.create("2");
  StringColumn sc3 = StringColumn.create("3");
  Table t = Table.create("t", sc, sc1, sc2, sc3);
  t.removeColumns(1, 3);
  assertTrue(t.containsColumn(sc));
  assertTrue(t.containsColumn(sc2));
  assertFalse(t.containsColumn(sc1));
  assertFalse(t.containsColumn(sc3));
}