@Test
void testGetRollUpPermutationsAsBooleansTagCountZero() {

    final Set<List<Boolean>> perms = RollUpBitMask.getRollUpPermutationsAsBooleans(0);
    assertThat(perms.size()).isEqualTo(1);
    final List<Boolean> perm = perms.iterator().next();
    assertThat(perm.size()).isEqualTo(1);
    assertThat(perm.get(0)).isEqualTo(false);
}