public static void validateCountry(Country country) throws TechnicalException {
        if (country == null) {
            throw new TechnicalException(MSG_ERR_NULL_ENTITY);
        }
        if ( ! isStringValid(country.getName(), NAME_SIZE)) {
            throw new TechnicalException(NAME_ERROR_MSG);
        }
        if ( ! isStringValid(country.getPicture(), PICTURE_SIZE)) {
            throw new TechnicalException(PICTURE_ERROR_MSG);
        }
    }