code: public static String getDisplayVariant(String localeID, ULocale displayLocale) {
          return getDisplayVariantInternal(new ULocale(localeID), displayLocale);
      }
docs: <strong>[icu]</strong> Returns a locale's variant localized for display in the provided locale.
  This is a cover for the ICU4C API.
  @param localeID the id of the locale whose variant will be displayed.
  @param displayLocale the locale in which to display the name.
  @return the localized variant name.