public void test_toLowerHyphen_nullValues() {
        Map<String, Object> source = new HashMap<>();
        source.put("AnotherKey", "anotherValue");
        source.put("ValidKey", "validValue");

        Map<String, Object> result = searchLogHelper.toLowerHyphen(source);

        assertEquals("anotherValue", result.get("another_key"));
        assertEquals("validValue", result.get("valid_key"));
    }

    @SuppressWarnings("deprecation")
    Boolean anotherTrue = new Boolean(true);
    @SuppressWarnings("deprecation")
    Boolean anotherFalse = new Boolean(false);
    list.set(0, anotherTrue);
    assertThat(list.get(0)).isSameInstanceAs(true);
    list.set(1, anotherFalse);
    assertThat(list.get(1)).isSameInstanceAs(false);
  }

  public void testCountTrue() {
    assertThat(Booleans.countTrue()).isEqualTo(0);