*       Stream.map}).
 *   <li><b>Do not</b> call {@link #doForward} or {@link #doBackward} directly; these exist only to
 *       be overridden.
 * </ul>
 *
 * <h3>Example</h3>
 *
 * <pre>
 *   return new Converter&lt;Integer, String&gt;() {
 *     protected String doForward(Integer i) {
 *       return Integer.toHexString(i);
 *     }
 *

 *       Stream.map}).
 *   <li><b>Do not</b> call {@link #doForward} or {@link #doBackward} directly; these exist only to
 *       be overridden.
 * </ul>
 *
 * <h3>Example</h3>
 *
 * <pre>
 *   return new Converter&lt;Integer, String&gt;() {
 *     protected String doForward(Integer i) {
 *       return Integer.toHexString(i);
 *     }
 *

			if nt == "" {
				nt = network
			}
			addr := dnsServer
			if addr == "" {
				addr = address
			}
			return d.DialContext(ctx, nt, addr)
		},
	}
}

// doForward sends the requests and collect the responses.
func doForward(ctx context.Context, cfg *Config, e *executor, doReq func(context.Context, *Config, int) (string, error)) (*proto.ForwardEchoResponse, error) {
	// make the timeout apply to the entire set of requests

	e *executor
}

func newTCPProtocol(e *executor) protocol {
	return &tcpProtocol{e: e}
}

func (c *tcpProtocol) ForwardEcho(ctx context.Context, cfg *Config) (*proto.ForwardEchoResponse, error) {
	return doForward(ctx, cfg, c.e, c.makeRequest)
}

func (c *tcpProtocol) makeRequest(ctx context.Context, cfg *Config, requestID int) (string, error) {
	conn, err := newTCPConnection(cfg)
	if err != nil {
		return "", err
	}

	default:
		getTransport, closeSharedTransport = newHTTPTransportGetter(cfg)
	}

	defer closeSharedTransport()

	call := &httpCall{
		httpProtocol: c,
		getTransport: getTransport,
	}

	return doForward(ctx, cfg, c.e, call.makeRequest)
}

func newHTTP3TransportGetter(cfg *Config) (httpTransportGetter, func()) {
	newConn := func() *http3.RoundTripper {
		return &http3.RoundTripper{
			TLSClientConfig: cfg.tlsConfig,

  }

  private <F, T> Converter<F, T> defaultConverter(
      final TypeToken<F> convertFromType, final TypeToken<T> convertToType) {
    return new Converter<F, T>() {
      @Override
      protected T doForward(F a) {
        return doConvert(convertToType);
      }

      @Override
      protected F doBackward(T b) {
        return doConvert(convertFromType);
      }

  }

  private <F, T> Converter<F, T> defaultConverter(
      final TypeToken<F> convertFromType, final TypeToken<T> convertToType) {
    return new Converter<F, T>() {
      @Override
      protected T doForward(F a) {
        return doConvert(convertToType);
      }

      @Override
      protected F doBackward(T b) {
        return doConvert(convertFromType);
      }

      implements Serializable {
    static final Converter<String, Integer> INSTANCE = new IntConverter();

    @Override
    protected Integer doForward(String value) {
      return Integer.decode(value);
    }

    @Override
    protected String doBackward(Integer value) {
      return value.toString();
    }

    @Override

  private static final class FloatConverter extends Converter<String, Float>
      implements Serializable {
    static final Converter<String, Float> INSTANCE = new FloatConverter();

    @Override
    protected Float doForward(String value) {
      return Float.valueOf(value);
    }

    @Override
    protected String doBackward(Float value) {
      return value.toString();
    }

    @Override

  private static final class FloatConverter extends Converter<String, Float>
      implements Serializable {
    static final Converter<String, Float> INSTANCE = new FloatConverter();

    @Override
    protected Float doForward(String value) {
      return Float.valueOf(value);
    }

    @Override
    protected String doBackward(Float value) {
      return value.toString();
    }

    @Override