long getRefreshNanos() {
    return (refreshNanos == UNSET_INT) ? DEFAULT_REFRESH_NANOS : refreshNanos;
  }

  /**
   * Specifies a nanosecond-precision time source for this cache. By default, {@link
   * System#nanoTime} is used.
   *
   * <p>The primary intent of this method is to facilitate testing of caches with a fake or mock
   * time source.
   *
   * @return this {@code CacheBuilder} instance (for chaining)

}

// Provided by package runtime.
func now() (sec int64, nsec int32, mono int64)

// runtimeNano returns the current value of the runtime clock in nanoseconds.
//
//go:linkname runtimeNano runtime.nanotime
func runtimeNano() int64

// Monotonic times are reported as offsets from startNano.
// We initialize startNano to runtimeNano() - 1 so that on systems where

	// hasn't had an update in a while. This check is necessary in
	// case the limiter is on but hasn't been checked in a while and
	// so may have left sufficient headroom to turn off again.
	if now == 0 {
		now = nanotime()
	}
	if gcCPULimiter.needUpdate(now) {
		gcCPULimiter.update(now)
	}

	if !gcMarkWorkAvailable(pp) {
		// No work to be done right now. This can happen at

		status = gp.waitreason.String()
	}

	// approx time the G is blocked, in minutes
	var waitfor int64
	if (gpstatus == _Gwaiting || gpstatus == _Gsyscall) && gp.waitsince != 0 {
		waitfor = (nanotime() - gp.waitsince) / 60e9
	}
	print("goroutine ", gp.goid)
	if gp.m != nil && gp.m.throwing >= throwTypeRuntime && gp == gp.m.curg || level >= 2 {
		print(" gp=", gp)
		if gp.m != nil {

        // effective model.
        //
        // As of 3.4, the model version is mandatory even in raw models. The XML element still is optional in the
        // XML schema and this will not change anytime soon. We do not want to build effective models based on
        // models without a version starting with 3.4.
        validateStringNotEmpty("modelVersion", problems, Severity.ERROR, Version.V20, m.getModelVersion(), m);

        // effective model.
        //
        // As of 3.4, the model version is mandatory even in raw models. The XML element still is optional in the
        // XML schema and this will not change anytime soon. We do not want to build effective models based on
        // models without a version starting with 3.4.
        validateStringNotEmpty("modelVersion", problems, Severity.ERROR, Version.V20, m.getModelVersion(), m);