}
        if (s.length() == 1) {
            return hankakuKatakanaToZenkakuKatakana(s.charAt(0)) + "";
        }
        final StringBuilder sb = new StringBuilder(s);
        int i;
        for (i = 0; i < sb.length() - 1; i++) {
            final char originalChar1 = sb.charAt(i);
            final char originalChar2 = sb.charAt(i + 1);
            final char margedChar = mergeChar(originalChar1, originalChar2);

        boolean inQuotes = false;

        for (int i = 0; i < line.length(); i++) {
            final char c = line.charAt(i);

            if (c == '"') {
                if (inQuotes && i + 1 < line.length() && line.charAt(i + 1) == '"') {
                    // Escaped quote
                    currentField.append('"');
                    i++; // Skip next quote

            return null;
        }
        if (trimText == null) {
            trimText = " ";
        }
        int pos = 0;
        for (; pos < text.length(); pos++) {
            if (trimText.indexOf(text.charAt(pos)) < 0) {
                break;
            }
        }
        return text.substring(pos);
    }

    /**
     * Removes whitespace from the right side of the string.
     *

            final StringBuilder sb = new StringBuilder();
            for (int i = 0; i < s.length(); i++) {
                final char ch = s.charAt(i);
                if (ch == '\\' && i < s.length() - 1) {
                    i++;
                    sb.append(s.charAt(i));
                } else {
                    sb.append(ch);
                }
            }
            return sb.toString();
        }

            final StringBuilder sb = new StringBuilder();
            for (int i = 0; i < s.length(); i++) {
                final char ch = s.charAt(i);
                if (ch == '\\' && i < s.length() - 1) {
                    i++;
                    sb.append(s.charAt(i));
                } else {
                    sb.append(ch);
                }
            }
            return sb.toString();
        }

                continue;
            }

            char ch = s.charAt(pos);
            pos++;
            if (ch == '\\') {
                sb.append(ch);
                if (pos >= end) {
                    break; // ERROR, or let it go?
                }
                ch = s.charAt(pos);
                pos++;
            }

            sb.append(ch);
        }

        if (text == null) {
            return null;
        }
        final char[] chars = new char[text.length()];
        for (int i = 0; i < chars.length; i++) {
            final char c = text.charAt(i);
            if (c >= 'ａ' && c <= 'ｚ') {
                chars[i] = (char) (c - 'ａ' + 'a');
            } else if (c >= 'Ａ' && c <= 'Ｚ') {
                chars[i] = (char) (c - 'Ａ' + 'A');

            final StringBuilder regex = new StringBuilder();
            regex.append("^"); // Match from the start

            for (int i = 0; i < pattern.length(); i++) {
                final char c = pattern.charAt(i);
                if (c == '*') {
                    // Wildcard: matches any sequence of characters
                    regex.append(".*");
                } else if (c == '$') {

        }
        String item = list.get(index).trim();
        if (StringUtil.isBlank(item)) {
            return StringUtil.EMPTY;
        }
        if (item.length() > 1 && item.charAt(0) == '"' && item.charAt(item.length() - 1) == '"') {
            item = item.substring(1, item.length() - 1);
        }
        return item;
    }

        }
        String item = list.get(index).trim();
        if (StringUtil.isBlank(item)) {
            return StringUtil.EMPTY;
        }
        if (item.length() > 1 && item.charAt(0) == '"' && item.charAt(item.length() - 1) == '"') {
            item = item.substring(1, item.length() - 1);
        }
        return item;
    }