/** The key of the message:  */
    public static final String ERRORS_front_header = "{errors.front_header}";

    /** The key of the message:  */
    public static final String ERRORS_front_footer = "{errors.front_footer}";

    /** The key of the message: <div class="alert alert-warning"> */
    public static final String ERRORS_front_prefix = "{errors.front_prefix}";

    /** The key of the message: </div> */

    String INDEX_DOCUMENT_CRAWLER_DATA_number_of_shards = "index.document.crawler.data.number_of_shards";

    /** The key of the configuration. e.g. 10 */
    String INDEX_DOCUMENT_CRAWLER_FILTER_number_of_shards = "index.document.crawler.filter.number_of_shards";

    /** The key of the configuration. e.g. 1 */
    String INDEX_DOCUMENT_CRAWLER_QUEUE_number_of_replicas = "index.document.crawler.queue.number_of_replicas";

    /** The path of the HTML: /error/system.jsp */
    HtmlNext path_Error_SystemJsp = new HtmlNext("/error/system.jsp");

    /** The path of the HTML: /footer.jsp */
    HtmlNext path_FooterJsp = new HtmlNext("/footer.jsp");

    /** The path of the HTML: /header.jsp */
    HtmlNext path_HeaderJsp = new HtmlNext("/header.jsp");

    /** The path of the HTML: /help.jsp */

   */
  // TODO(kevinb): how can we omit that Iterables link when building gwt
  // javadoc?
  public static <E extends @Nullable Object> Collection<E> filter(
      Collection<E> unfiltered, Predicate<? super E> predicate) {
    if (unfiltered instanceof FilteredCollection) {
      // Support clear(), removeAll(), and retainAll() when filtering a filtered
      // collection.

   */
  // TODO(kevinb): how can we omit that Iterables link when building gwt
  // javadoc?
  public static <E extends @Nullable Object> Collection<E> filter(
      Collection<E> unfiltered, Predicate<? super E> predicate) {
    if (unfiltered instanceof FilteredCollection) {
      // Support clear(), removeAll(), and retainAll() when filtering a filtered
      // collection.

    protected static final String CACHE_MSG = "cache_msg";

    protected static final Pattern LOCAL_PATH_PATTERN = Pattern.compile("^file:/+[a-zA-Z]:");

    protected static final Pattern SHARED_FOLDER_PATTERN = Pattern.compile("^file:/+[^/]\\.");

    protected static final String ELLIPSIS = "...";

    protected boolean encodeUrlLink = false;

    protected String urlLinkEncoding = Constants.UTF_8;

   * java.util.stream.Stream#filter}. This method is not being deprecated, but we gently encourage
   * you to migrate to streams.
   */
  // TODO(kevinb): how to omit that last sentence when building GWT javadoc?
  public static <E extends @Nullable Object> Set<E> filter(
      Set<E> unfiltered, Predicate<? super E> predicate) {
    if (unfiltered instanceof SortedSet) {
      return filter((SortedSet<E>) unfiltered, predicate);

    return stringWriter.toString();
  }

  /**
   * Returns the stack trace of {@code throwable}, possibly providing slower iteration over the full
   * trace but faster iteration over parts of the trace. Here, "slower" and "faster" are defined in
   * comparison to the normal way to access the stack trace, {@link Throwable#getStackTrace()

    return stringWriter.toString();
  }

  /**
   * Returns the stack trace of {@code throwable}, possibly providing slower iteration over the full
   * trace but faster iteration over parts of the trace. Here, "slower" and "faster" are defined in
   * comparison to the normal way to access the stack trace, {@link Throwable#getStackTrace()

  }

  public void testTruncate() {
    assertEquals("foobar", Ascii.truncate("foobar", 10, "..."));
    assertEquals("fo...", Ascii.truncate("foobar", 5, "..."));
    assertEquals("foobar", Ascii.truncate("foobar", 6, "..."));
    assertEquals("...", Ascii.truncate("foobar", 3, "..."));
    assertEquals("foobar", Ascii.truncate("foobar", 10, "…"));
    assertEquals("foo…", Ascii.truncate("foobar", 4, "…"));