}
  }

  /**
   * Returns an optional enum constant for the given type, using {@link Enum#valueOf}. If the
   * constant does not exist, {@link Optional#absent} is returned. A common use case is for parsing
   * user input or falling back to a default enum constant. For example, {@code
   * Enums.getIfPresent(Country.class, countryInput).or(Country.DEFAULT);}
   *
   * @since 12.0
   */

    String safeChars = "\0\u0100\uD800\uDC00\uFFFF";
    assertThat(escaper.escape(safeChars)).isEqualTo(safeChars);

    // Ensure that Unicode escapers behave correctly wrt badly formed input.
    String badUnicode = "\uDC00\uD800";
    assertThrows(IllegalArgumentException.class, () -> escaper.escape(badUnicode));
  }

  public void testSafeRange() throws IOException {

	// According to s3 document, if startIdx < 1, it is set to 1.
	if startIdx < 1 {
		startIdx = 1
	}

	if startIdx > len(rs) {
		startIdx = len(rs) + 1
	}

	// StartIdx is 1-based in the input
	startIdx--
	endIdx := len(rs)
	if length != -1 {
		if length < 0 {
			return "", errInvalidSubstringIndexLen
		}

		if length > (endIdx - startIdx) {
			length = endIdx - startIdx
		}

     * according to the configured patterns.
     *
     * @param url the URL to convert
     * @return the converted URL after applying all duplicate host rules,
     *         or null if the input URL is null
     */
    public String convert(final String url) {
        if (url == null) {
            return null;
        }

        if (duplicateHostList == null) {
            init();
        }

                                    key="labels.bad_word_file"/></label>
                                <div class="col-sm-9">
                                    <input type="file" id="badWordFile" name="badWordFile" class="form-control-file"/>
                                </div>
                            </div>
                            </c:if>
                        </div>

		// Copy to new array.
		workers = append(workers, *v...)
	}

	if n == len(workers) || n < 1 {
		return
	}

	for len(workers) < n {
		input := make(chan expiryOp, 10000)
		workers = append(workers, input)
		go es.Worker(input)
		es.stats.workers.Add(1)
	}

	for len(workers) > n {
		worker := workers[len(workers)-1]
		workers = workers[:len(workers)-1]
		worker <- expiryOp(nil)

   *   for (B b1 : lists.get(1)) {
   *     ...
   *     ImmutableList<B> tuple = ImmutableList.of(b0, b1, ...);
   *     // operate on tuple
   *   }
   * }
   * }
   *
   * <p>Note that if any input list is empty, the Cartesian product will also be empty. If no lists
   * at all are provided (an empty list), the resulting Cartesian product has one element, an empty
   * list (counter-intuitive, but mathematically consistent).

    // Test load with existing user
    @Test
    public void test_load_existingUser() {
        TestAuthenticationChain chain = new TestAuthenticationChain();
        User inputUser = createTestUser("inputuser", "Input User");
        User loadedUser = createTestUser("loadeduser", "Loaded User");
        chain.loadResult = loadedUser;

        User result = chain.load(inputUser);

        assertNotNull(result);

   *
   * <p>Note that the host-only formats will leave the port field undefined. You can use {@link
   * #withDefaultPort(int)} to patch in a default value.
   *
   * @param hostPortString the input string to parse.
   * @return if parsing was successful, a populated HostAndPort object.
   * @throws IllegalArgumentException if nothing meaningful could be parsed.
   */

        }
    }

    /**
     * @deprecated use {@link #build(StreamSupplier, String)}
     */
    @Deprecated
    public PluginDescriptor build(InputStream input, String source) throws PlexusConfigurationException {
        return build(() -> input, source);
    }

    public PluginDescriptor build(StreamSupplier inputSupplier) throws PlexusConfigurationException {
        return build(inputSupplier, null);
    }