FUTURE(Timeout.SMALL, Timeout.MAX),
    SMALL(Timeout.SMALL),
    FINITE(Timeout.MIN, Timeout.MINUS_SMALL, Timeout.ZERO, Timeout.SMALL),
    INFINITE(Timeout.LARGE, Timeout.MAX);

    final ImmutableList<Timeout> timeouts;

    TimeoutsToUse(Timeout... timeouts) {
      this.timeouts = ImmutableList.copyOf(timeouts);
    }
  }

  /** Possible outcomes of calling any of the methods under test. */

	drwMutexInfinite = 1<<63 - 1
)

// Timeouts are timeouts for specific operations.
type Timeouts struct {
	// Acquire - tolerance limit to wait for lock acquisition before.
	Acquire time.Duration

	// RefreshCall - timeout for the refresh call
	RefreshCall time.Duration

	// UnlockCall - timeout for the unlock call
	UnlockCall time.Duration

	// ForceUnlockCall - timeout for the force unlock call

    check(exchange == null) { "Timeouts can't be adjusted in a network interceptor" }

    return copy(readTimeoutMillis = checkDuration("readTimeout", timeout.toLong(), unit))
  }

  override fun writeTimeoutMillis(): Int = writeTimeoutMillis

  override fun withWriteTimeout(
    timeout: Int,
    unit: TimeUnit,
  ): Interceptor.Chain {
    check(exchange == null) { "Timeouts can't be adjusted in a network interceptor" }

    FUTURE(Timeout.SMALL, Timeout.MAX),
    SMALL(Timeout.SMALL),
    FINITE(Timeout.MIN, Timeout.MINUS_SMALL, Timeout.ZERO, Timeout.SMALL),
    INFINITE(Timeout.LARGE, Timeout.MAX);

    final ImmutableList<Timeout> timeouts;

    TimeoutsToUse(Timeout... timeouts) {
      this.timeouts = ImmutableList.copyOf(timeouts);
    }
  }

  /** Possible outcomes of calling any of the methods under test. */

      Future<V> future, long timeout, TimeUnit unit) throws ExecutionException, TimeoutException {
    boolean interrupted = false;
    try {
      long remainingNanos = unit.toNanos(timeout);
      long end = System.nanoTime() + remainingNanos;

      while (true) {
        try {
          // Future treats negative timeouts just like zero.
          return future.get(remainingNanos, NANOSECONDS);

      Future<V> future, long timeout, TimeUnit unit) throws ExecutionException, TimeoutException {
    boolean interrupted = false;
    try {
      long remainingNanos = unit.toNanos(timeout);
      long end = System.nanoTime() + remainingNanos;

      while (true) {
        try {
          // Future treats negative timeouts just like zero.
          return future.get(remainingNanos, NANOSECONDS);

	var clnts []NetLocker
	for i := 0; i < len(nodes); i++ {
		clnts = append(clnts, newClient(nodes[i].URL))
	}

	ds = &Dsync{
		GetLockers: func() ([]NetLocker, string) { return clnts, uuid.New().String() },
		Timeouts: Timeouts{
			Acquire:         testDrwMutexAcquireTimeout,
			RefreshCall:     testDrwMutexRefreshCallTimeout,
			UnlockCall:      testDrwMutexUnlockCallTimeout,
			ForceUnlockCall: testDrwMutexForceUnlockCallTimeout,
		},
	}

)

var (
	internodeErrorsTotalMD = NewCounterMD(internodeErrorsTotal,
		"Total number of failed internode calls")
	internodeDialedErrorsTotalMD = NewCounterMD(internodeDialErrorsTotal,
		"Total number of internode TCP dial timeouts and errors")
	internodeDialAvgTimeNanosMD = NewGaugeMD(internodeDialAvgTimeNanos,
		"Average dial time of internode TCP calls in nanoseconds")
	internodeSentBytesTotalMD = NewCounterMD(internodeSentBytesTotal,

          IllegalStateException("Invalid content-type: ${body.contentType()}"),
          response,
        )
        return
      }

      // This is a long-lived response. Cancel full-call timeouts.
      call?.timeout()?.cancel()

      // Replace the body with a stripped one so the callbacks can't see real data.
      val response = response.stripBody()

      val reader = ServerSentEventReader(body.source(), this)

- **Focus**:
  1. Configuration of Envoy proxies by Pilot.
  1. Communication between Pilot and Envoy proxies.
  1. Validation of service discovery.
  1. Testing of traffic management policies (e.g., routing, retries, timeouts).
  1. Validation of load balancing configurations.
  1. Specific `istioctl proxy-config` commands being tested: `bootstrap`, `cluster`, `endpoint`, `listener`, `route`, `all`.