*/
  private static String[] getHostAndPortFromBracketedHost(String hostPortString) {
    checkArgument(
        hostPortString.charAt(0) == '[',
        "Bracketed host-port string must start with a bracket: %s",
        hostPortString);
    int colonIndex = hostPortString.indexOf(':');
    int closeBracketIndex = hostPortString.lastIndexOf(']');
    checkArgument(
        colonIndex > -1 && closeBracketIndex > colonIndex,