public String toFormulaString() {String value = field_3_string;int len = value.length();StringBuilder sb = new StringBuilder(len + 4);sb.append(FORMULA_DELIMITER);for (int i = 0; i < len; i++) {char c = value.charAt(i);if (c == FORMULA_DELIMITER) {sb.append(FORMULA_DELIMITER);}sb.append(c);}sb.append(FORMULA_DELIMITER);return sb.toString();}