docs: public boolean isValidCountryCodeTld(String ccTld) {
          final String key = chompLeadingDot(unicodeToASCII(ccTld).toLowerCase(Locale.ENGLISH));
          return (arrayContains(COUNTRY_CODE_TLDS, key) || arrayContains(countryCodeTLDsPlus, key))
                  && !arrayContains(countryCodeTLDsMinus, key);
      }