class Ipv4UnicastAddressFamily extends AddressFamily {

  public static Builder builder() {
    return new Builder();
  }

  private  Ipv4UnicastAddressFamily(
      AddressFamilyCapabilities addressFamilyCapabilities,
      @Nullable String exportPolicy,
      SortedSet<String> exportPolicySources,
      @Nullable String importPolicy,
      SortedSet<String> importPolicySources,
      boolean routeReflectorClient);

}