private static BigInteger oldSlowFactorial(int n) {
    if (n <= 20) {
      return BigInteger.valueOf(LongMath.factorial(n));
    } else {
      int k = 20;
      return BigInteger.valueOf(LongMath.factorial(k)).multiply(oldSlowFactorial(k, n));
    }
  }

  /** Returns the product of {@code n1} exclusive through {@code n2} inclusive. */

    expectContents(contents);
  }

  /**
   * Returns {@link Method} instances for the remove tests that assume multisets support duplicates
   * so that the test of {@code Multisets.forSet()} can suppress them.
   */
  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static List<Method> getRemoveDuplicateInitializingMethods() {

   * unspecified if this method is called more than once on the same instance.
   */
  HashCode hash();

  /**
   * {@inheritDoc}
   *
   * @deprecated This returns {@link Object#hashCode()}; you almost certainly mean to call {@code
   *     hash().asInt()}.
   */
  @Override
  @Deprecated
  int hashCode();

    expectContents(contents);
  }

  /**
   * Returns {@link Method} instances for the remove tests that assume multisets support duplicates
   * so that the test of {@code Multisets.forSet()} can suppress them.
   */
  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static List<Method> getRemoveDuplicateInitializingMethods() {

    }

    @Test
    void isAllDigitsHandlesEmptyString() {
        // Empty string technically has no non-digit characters, so it returns true
        assertTrue(UniAddress.isAllDigits(""), "isAllDigits should return true for empty string (no non-digits)");
    }

    /* ---------------------------------------------------------------------

/**
 * Unit tests for the Features class.
 */
class FeaturesTest {

    @Test
    void testDeployBuildPomDefaultValue() {
        // Test that deployBuildPom returns true by default (when property is not set)
        Map<String, Object> emptyProperties = Map.of();
        assertTrue(Features.deployBuildPom(emptyProperties));

        // Test with null properties

  }

  /**
   * Returns {@link Method} instances for the tests that assume that the inverse will be the same
   * after serialization.
   */
  @J2ktIncompatible
  @GwtIncompatible // reflection
  public static List<Method> getInverseSameAfterSerializingMethods() {
    return Collections.singletonList(getMethod("testInverseSerialization"));
  }

  @J2ktIncompatible

  public void testPut_nullKeyAndValueSupported() {
    assertNull("put(null, null) should return null", put(nullKeyValueEntry));
    expectAdded(nullKeyValueEntry);
  }

  @CanIgnoreReturnValue
  private V put(Entry<K, V> entry) {
    return getMap().put(entry.getKey(), entry.getValue());
  }

  /**
   * Returns the {@link Method} instance for {@link #testPut_nullKeyUnsupported()} so that tests of

        val host = url.host
        return host.substring(1, host.length - 5).lowercase()
      }

      override fun canonicalize(s: String): String = s.lowercase()
    },

    PATH {
      override fun urlString(value: String): String = "http://example.com/a${value}z/"

      override fun encodedValue(url: HttpUrl): String {
        val path = url.encodedPath
        return path.substring(2, path.length - 2)
      }

     *
     * @return an {@link Optional} containing the boolean value {@code true} if specified, or empty
     */
    Optional<Boolean> force();

    /**
     * Should imply "yes" to all questions.
     *
     * @return an {@link Optional} containing the boolean value {@code true} if specified, or empty
     */
    Optional<Boolean> yes();

    /**
     * Returns the list of encryption goals to be executed.