* endpoint) or <i>closed</i> (includes the endpoint) on that side. With three possibilities on each
 * side, this yields nine basic types of ranges, enumerated below. (Notation: a square bracket
 * ({@code [ ]}) indicates that the range is closed on that side; a parenthesis ({@code ( )}) means
 * it is either open or unbounded. The construct {@code {x | statement}} is read "the set of all

   */
  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,