final String[] v2 = v1[0].split(":", 2);
                    if (v2.length == 2) {
                        return new Tuple3<>(v2[0].trim(), v2[1].trim(), v1[1].replaceAll("[^a-zA-Z0-9_]", StringUtil.EMPTY).trim());
                    }
                }
                return null;
            }).filter(v -> {
                if (v == null) {
                    return false;

user.code.request.parameter=userCode
# User code minimum length.
user.code.min.length=20
# User code maximum length.
user.code.max.length=100
# User code pattern for validation.
user.code.pattern=[a-zA-Z0-9_]+

# ----------------------------------------------------------
#                                                       Mail
#                                                     ------

    String USER_CODE_MIN_LENGTH = "user.code.min.length";

    /** The key of the configuration. e.g. 100 */
    String USER_CODE_MAX_LENGTH = "user.code.max.length";

    /** The key of the configuration. e.g. [a-zA-Z0-9_]+ */
    String USER_CODE_PATTERN = "user.code.pattern";

    /** The key of the configuration. e.g. Administrator */
    String MAIL_FROM_NAME = "mail.from.name";