T value = (T) ArbitraryInstances.get(rawType);
    if (value != null) {
      return value;
    }
    if (rawType.isInterface()) {
      return new SerializableDummyProxy(this).newProxy(type);
    }
    return null;
  }

  private static <T> T createInstance(Invokable<?, ? extends T> factory, List<?> args)

	// This is a mode used for permission-less docker, where iptables can't be
	// used.
	a.envoyOpts.AgentIsRoot = os.Getuid() == 0 && strings.HasSuffix(a.cfg.DNSAddr, ":53")

	envoyProxy := envoy.NewProxy(a.envoyOpts)

	drainDuration := a.proxyConfig.TerminationDrainDuration.AsDuration()
	localHostAddr := localHostIPv4
	if a.cfg.IsIPv6 {
		localHostAddr = localHostIPv6
	}