registerModifiedProperty("carLicense");
        this.carLicense = value;
    }

    public String getCity() {
        checkSpecifiedProperty("city");
        return convertEmptyToNull(city);
    }

    public void setCity(String value) {
        registerModifiedProperty("city");
        this.city = value;
    }

    public String getDepartmentNumber() {

                "businessCategory");
        setupEpg(_epgMap, et -> ((User) et).getCarLicense(), (et, vl) -> ((User) et).setCarLicense(DfTypeUtil.toString(vl)), "carLicense");
        setupEpg(_epgMap, et -> ((User) et).getCity(), (et, vl) -> ((User) et).setCity(DfTypeUtil.toString(vl)), "city");
        setupEpg(_epgMap, et -> ((User) et).getDepartmentNumber(), (et, vl) -> ((User) et).setDepartmentNumber(DfTypeUtil.toString(vl)),
                "departmentNumber");

    }

    @Test
    public void test_user_city() {
        final User user = new User();
        assertNull(user.getCity());

        user.setCity("San Francisco");
        assertEquals("San Francisco", user.getCity());
    }

    @Test
    public void test_user_postOfficeBox() {
        final User user = new User();
        assertNull(user.getPostOfficeBox());

            result.setBusinessCategory(DfTypeUtil.toString(source.get("businessCategory")));
            result.setCarLicense(DfTypeUtil.toString(source.get("carLicense")));
            result.setCity(DfTypeUtil.toString(source.get("city")));
            result.setDepartmentNumber(DfTypeUtil.toString(source.get("departmentNumber")));
            result.setDescription(DfTypeUtil.toString(source.get("description")));

                setAttributeValue(result, fessConfig.getLdapAttrPostalAddress(), o -> user.setPostalAddress(o.toString()));
                setAttributeValue(result, fessConfig.getLdapAttrCity(), o -> user.setCity(o.toString()));
                setAttributeValue(result, fessConfig.getLdapAttrTeletexTerminalIdentifier(),
                        o -> user.setTeletexTerminalIdentifier(o.toString()));

        assertThat(ZERO.setBit(result)).isAtMost(x);
        assertThat(ZERO.setBit(result + 1)).isGreaterThan(x);
      }
    }
  }

  public void testLog2Ceiling() {
    for (BigInteger x : POSITIVE_BIGINTEGER_CANDIDATES) {
      for (RoundingMode mode : asList(CEILING, UP)) {
        int result = BigIntegerMath.log2(x, mode);
        assertThat(ZERO.setBit(result)).isAtLeast(x);

    }

    @GwtIncompatible // used only from other GwtIncompatible code
    @Override
    void setBits(BitSet table) {
      BitSet tmp1 = new BitSet();
      first.setBits(tmp1);
      BitSet tmp2 = new BitSet();
      second.setBits(tmp2);
      tmp1.and(tmp2);
      table.or(tmp1);
    }

    @Override
    public String toString() {

    }

    @GwtIncompatible // used only from other GwtIncompatible code
    @Override
    void setBits(BitSet table) {
      BitSet tmp1 = new BitSet();
      first.setBits(tmp1);
      BitSet tmp2 = new BitSet();
      second.setBits(tmp2);
      tmp1.and(tmp2);
      table.or(tmp1);
    }

    @Override
    public String toString() {

    int digits = RANDOM_SOURCE.nextInt(numBits);
    if (digits == 0) {
      return new BigInteger(1, RANDOM_SOURCE);
    } else {
      return new BigInteger(digits, RANDOM_SOURCE).setBit(digits);
    }
  }

  /**
   * Equivalent to calling randomPositiveBigInteger(numBits) and then flipping the sign with 50%
   * probability.
   */
  static BigInteger randomNonZeroBigInteger(int numBits) {

        index = (index + 1) & mask;
      }
      // Check to see if we wrapped around the whole table.
    } while (index != startingIndex);
    return false;
  }

  @Override
  void setBits(BitSet table) {
    if (containsZero) {
      table.set(0);
    }
    for (char c : this.table) {
      if (c != 0) {
        table.set(c);
      }
    }
  }