*/
  @CanIgnoreReturnValue
  public HostAndPort requireBracketsForIPv6() {
    checkArgument(!hasBracketlessColons, "Possible bracketless IPv6 literal: %s", host);
    return this;
  }

  @Override
  public boolean equals(@CheckForNull Object other) {
    if (this == other) {
      return true;
    }
    if (other instanceof HostAndPort) {
      HostAndPort that = (HostAndPort) other;