code: public static final ULocale getFunctionalEquivalent(String keyword,
                                                          ULocale locID) {
          return getFunctionalEquivalent(keyword, locID, null);
      }
docs: <strong>[icu]</strong> Returns the functionally equivalent locale for the given
  requested locale, with respect to given keyword, for the
  collation service.
  @param keyword a particular keyword as enumerated by
  getKeywords.
  @param locID The requested locale
  @return the locale
  @see #getFunctionalEquivalent(String,ULocale,boolean[])