class HeaderHelper {

    static void appendWithQuote(StringBuilder target, String appendMe) {
        if (appendMe == null) {
            return;
        }
        Matcher matcher = WHITESPACE_QUOTE_PATTERN.matcher(appendMe);

        if (matcher.find()) {
            target.append('"');
            appendEscapeQuote(target, appendMe);
            target.append('"');
        } else {
            target.append(appendMe);
        }
    }

    private  HeaderHelper();

}