return new Negated(this);
  }

  /**
   * Returns a matcher that matches any character matched by both this matcher and {@code other}.
   */
  public CharMatcher and(CharMatcher other) {
    return new And(this, other);
  }

  /**
   * Returns a matcher that matches any character matched by either this matcher or {@code other}.
   */
  public CharMatcher or(CharMatcher other) {

            final Matcher matcher = pattern.matcher(v.trim());
            if (matcher.matches()) {
                final PrunedTag tag = new PrunedTag(matcher.group(1));
                if (matcher.group(2) != null) {
                    final String attrPair = matcher.group(2).substring(1, matcher.group(2).length() - 1);

    checkArgument(
        !separatorPattern.matcher("").matches(),
        "The pattern may not match the empty string: %s",
        separatorPattern);

    return new Splitter(
        new Strategy() {
          @Override
          public SplittingIterator iterator(final Splitter splitter, CharSequence toSplit) {
            final CommonMatcher matcher = separatorPattern.matcher(toSplit);

            if (obj != null) {
                value = obj.toString();
            }
            final Matcher matcher = entry.getValue().matcher(value);
            if (allRequired) {
                if (!matcher.matches()) {
                    return false;
                }
            } else if (matcher.matches()) {
                return true;
            }
        }

        return allRequired;
    }

                }
                return true;
            }
            if (includedPaths.matcher(path).matches()) {
                if (excludedPaths != null && excludedPaths.matcher(path).matches()) {
                    if (logger.isDebugEnabled()) {
                        logger.debug("Path {} matches the include/exclude path expression {} on {} of label.", path, excludedPaths, value);
                    }

            throw new RobotsTxtException("Failed to parse robots.txt.", e);
        }
    }

    protected String getValue(final Pattern pattern, final String line) {
        final Matcher m = pattern.matcher(line);
        if (m.matches() && m.groupCount() > 0) {
            return m.group(1);
        }
        return null;
    }

    protected String stripComment(final String line) {

        if (lastHyphen > 0) {
            int prevHyphen = version.lastIndexOf('-', lastHyphen - 1);
            if (prevHyphen > 0) {
                Matcher m = Artifact.VERSION_FILE_PATTERN.matcher(version);
                if (m.matches()) {
                    return m.group(1) + "-" + Artifact.SNAPSHOT_VERSION;
                }
            }
        }
        return version;
    }

            public FileVisitResult visitFile(Path file, BasicFileAttributes attrs) throws IOException {
                String filename = file.getFileName().toString();
                if (mavenArtifactJar.matcher(filename).matches()) {
                    Process p = Runtime.getRuntime().exec(new String[] {
                        Paths.get(System.getProperty("java.home"), "bin/java").toString(),
                        "-jar",

        Matcher matcher = linkPattern.matcher(line);
        while (matcher.find()) {
            MatchResult xrefMatcher = matcher.toMatchResult();
            String link = xrefMatcher.group(1);
            if (link.contains("#")) {
                Matcher linkMatcher = linkWithHashPattern.matcher(link);
                if (linkMatcher.matches()) {

    }

    private static boolean isOldMethod(JApiMethod jApiMethod, Map<AccessorKey, ReplacedAccessor> upgradedMethods, Pattern pattern) {
        String name = jApiMethod.getName();
        if (!pattern.matcher(name).matches()) {
            return false;
        }
        return upgradedMethods.containsKey(AccessorKey.ofOldMethod(jApiMethod));
    }