return appendFileterPath(buf, escape(s));
    }

    /**
     * Escapes special regex characters in a string to create a literal pattern.
     * Handles anchor characters (^ and $) specially to preserve their regex meaning.
     *
     * @param s the string to escape
     * @return an escaped regex pattern, or empty string for comments
     */
    protected String escape(final String s) {

      .assertLogMatch(Regex("""User-Agent: okhttp/.+"""))
      .assertLogEqual("--> END GET")
      .assertLogMatch(Regex("""<-- 200 OK $url \(\d+ms\)"""))
      .assertLogEqual("Content-Type: text/html; charset=0")
      .assertLogMatch(Regex("""Content-Length: \d+"""))
      .assertLogMatch(Regex(""))
      .assertLogEqual("Body with unknown charset")
      .assertLogMatch(Regex("""<-- END HTTP \(\d+ms, 25-byte body\)"""))

    }

    public void setRegex_Equal(String regex) {
        setRegex_Term(regex, null);
    }

    public void setRegex_Equal(String regex, ConditionOptionCall<TermQueryBuilder> opLambda) {
        setRegex_Term(regex, opLambda);
    }

    public void setRegex_Term(String regex) {
        setRegex_Term(regex, null);
    }

    public void setRegex_Term(String regex, ConditionOptionCall<TermQueryBuilder> opLambda) {

        this.processType = value;
    }

    public String getRegex() {
        checkSpecifiedProperty("regex");
        return convertEmptyToNull(regex);
    }

    public void setRegex(String value) {
        registerModifiedProperty("regex");
        this.regex = value;
    }

    public String getReplacement() {
        checkSpecifiedProperty("replacement");

      .assertLogMatch(Regex("""callStart: Request\{method=POST, url=$url\}"""))
      .assertLogMatch(Regex("""proxySelectStart: $url"""))
      .assertLogMatch(Regex("""proxySelectEnd: \[DIRECT]"""))
      .assertLogMatch(Regex("""dnsStart: ${url.host}"""))
      .assertLogMatch(Regex("""dnsEnd: \[.+]"""))
      .assertLogMatch(Regex("""connectStart: ${url.host}/.+ DIRECT"""))
      .assertLogMatch(Regex("""connectEnd: http/1.1"""))

    }

    public void setRegex_Terms(ConditionOptionCall<TermsAggregationBuilder> opLambda) {
        setRegex_Terms("regex", opLambda, null);
    }

    public void setRegex_Terms(ConditionOptionCall<TermsAggregationBuilder> opLambda, OperatorCall<BsPathMappingCA> aggsLambda) {
        setRegex_Terms("regex", opLambda, aggsLambda);
    }

    /**
     * Adds custom system properties that match the given regex pattern to the command list.
     *
     * @param cmdList the command list to add properties to
     * @param regex the regular expression pattern to match property names
     */
    protected void addFessCustomSystemProperties(final List<String> cmdList, final String regex) {
        if (StringUtil.isNotBlank(regex)) {
            final Pattern pattern = Pattern.compile(regex);

            false, false, "keyword", 0, 0, null, null, false, null, null, null, null, null, false);
    protected final ColumnInfo _columnRegex = cci("regex", "regex", null, null, String.class, "regex", null, false, false, false, "keyword",
            0, 0, null, null, false, null, null, null, null, null, false);

     * @param regex the regular expression to use for splitting the string
     * @return a stream of substrings resulting from splitting the input string, or an empty stream if the input is {@code null}
     */
    public static StreamOf<String> split(final String value, final String regex) {
        return stream(value == null ? null : value.split(regex));
    }

    /**

        regQ(wildcardQuery);
        return wildcardQuery;
    }

    protected RegexpQueryBuilder regRegexpQ(String name, String regexp) {
        checkEsInvalidQuery(name, regexp);
        RegexpQueryBuilder regexpQuery = QueryBuilders.regexpQuery(name, regexp);
        regQ(regexpQuery);
        return regexpQuery;
    }

    protected CommonTermsQueryBuilder regCommonTermsQ(String name, Object text) {