code: public static String getKeywordValue(String localeID, String keywordName) {
          return new LocaleIDParser(localeID).getKeywordValue(keywordName);
      }
docs: <strong>[icu]</strong> Returns the value for a keyword in the specified locale. If the keyword is
  not defined, returns null.  The locale name does not need to be normalized.
  @param keywordName name of the keyword whose value is desired. Case insensitive.
  @return String the value of the keyword as a string