code: public boolean isValidInfrastructureTld(String iTld) {
          final String key = chompLeadingDot(unicodeToASCII(iTld).toLowerCase(Locale.ENGLISH));
          return arrayContains(INFRASTRUCTURE_TLDS, key);
      }
docs: Returns true if the specified <code>String</code> matches any
  IANA-defined infrastructure top-level domain. Leading dots are
  ignored if present. The search is case-insensitive.
  @param iTld the parameter to check for infrastructure TLD status, not null
  @return true if the parameter is an infrastructure TLD