* The value is, e.g. [a-zA-Z0-9_]+ <br>
     * comment: User code pattern for validation.
     * @return The value of found property. (NotNull: if not found, exception but basically no way)
     */
    String getUserCodePattern();

    /**
     * Get the value for the key 'mail.from.name'. <br>
     * The value is, e.g. Administrator <br>
     * comment: Name to display in the From field of emails.