public void setCountryGroup(final CountryGroup GROUP) {
        if (null == countryGroup) {
            _countryGroup = GROUP;
            fireTileEvent(RECALC_EVENT);
        } else {
            if (!countryGroup.isBound()) {
                countryGroup.set(GROUP);
            }
        }
    }
Defines the Locale that will be used to visualize the country
in the CountryTileSkin
@param COUNTRY
src/main/java/eu/hansolo/tilesfx/Tile.java