return cfg, errors.New("invalid API max requests value")
	}

	requestsDeadline, err := time.ParseDuration(env.Get(EnvAPIRequestsDeadline, kvs.GetWithDefault(apiRequestsDeadline, DefaultKVS)))
	if err != nil {
		return cfg, err
	}
	cfg.RequestsDeadline = requestsDeadline

	clusterDeadline, err := time.ParseDuration(env.Get(EnvAPIClusterDeadline, kvs.GetWithDefault(apiClusterDeadline, DefaultKVS)))
	if err != nil {

	// d.Truncate( 10m0s) = 1h10m0s
	// d.Truncate(1h0m0s) = 1h0m0s
}

func ExampleParseDuration() {
	hours, _ := time.ParseDuration("10h")
	complex, _ := time.ParseDuration("1h10m10s")
	micro, _ := time.ParseDuration("1µs")
	// The package also accepts the incorrect but common prefix u for micro.
	micro2, _ := time.ParseDuration("1us")

	fmt.Println(hours)
	fmt.Println(complex)

	cfg.ExpirationWorkersWait = 0

	rduration, err := time.ParseDuration(env.Get(EnvReplicationWorkersWait, kvs.GetWithDefault(ReplicationWorkersWait, DefaultKVS)))
	if err != nil {
		return cfg, err
	}
	if rduration < 0 {
		return cfg, config.ErrInvalidBatchReplicationWorkersWait(nil)
	}

	kduration, err := time.ParseDuration(env.Get(EnvKeyRotationWorkersWait, kvs.GetWithDefault(KeyRotationWorkersWait, DefaultKVS)))

	d := env.Get(EnvMaxDriveTimeout, env.Get(EnvMaxDriveTimeoutLegacy, env.Get(EnvMaxDiskTimeoutLegacy, kvs.GetWithDefault(MaxTimeout, DefaultKVS))))
	if d == "" {
		cfg.MaxTimeout = 30 * time.Second
	} else {
		dur, _ := time.ParseDuration(d)
		if dur < time.Second {
			cfg.MaxTimeout = 30 * time.Second
		} else {
			cfg.MaxTimeout = getMaxTimeout(dur)
		}
	}
	return cfg, err
}

func getMaxTimeout(t time.Duration) time.Duration {

      spec.recordStats = true;
    }
  }

  /** Base class for parsing times with durations */
  abstract static class DurationParser implements ValueParser {
    protected abstract void parseDuration(CacheBuilderSpec spec, long duration, TimeUnit unit);

    @Override
    public void parse(CacheBuilderSpec spec, String key, @CheckForNull String value) {
      if (isNullOrEmpty(value)) {

      spec.recordStats = true;
    }
  }

  /** Base class for parsing times with durations */
  abstract static class DurationParser implements ValueParser {
    protected abstract void parseDuration(CacheBuilderSpec spec, long duration, TimeUnit unit);

    @Override
    public void parse(CacheBuilderSpec spec, String key, @CheckForNull String value) {
      if (isNullOrEmpty(value)) {

		if err != nil {
			return
		}

		// create cert options
		certOpts := CertOpts{}
		err = ff.GenerateStruct(&certOpts)
		if err != nil {
			return
		}
		TTL, err := time.ParseDuration("800ms")
		if err != nil {
			return
		}
		certOpts.TTL = TTL

		// call target
		ca.Sign(csrPEM, certOpts)
	})

		maxWait = env.Get(EnvMaxWait, kvs.GetWithDefault(MaxWait, DefaultKVS))
	}
	cfg.MaxWait, err = time.ParseDuration(maxWait)
	if err != nil {
		return err
	}
	cycle := env.Get(EnvCycle, kvs.GetWithDefault(Cycle, DefaultKVS))
	if cycle == "" {
		cycle = "1m"
	}
	cfg.Cycle, err = time.ParseDuration(cycle)
	if err != nil {
		return err
	}
	return nil

		ConfigType: &listener.Filter_TypedConfig{TypedConfig: protoconv.MessageToAny(tcpProxy)},
	})

	return filterStack
}

func parseDuration(s string) *durationpb.Duration {
	if s == "" {
		return nil
	}
	t, err := time.ParseDuration(s)
	if err != nil {
		return nil
	}
	return durationpb.New(t)
}

// UnmarshalJSON implements the json.Unmarshaller interface.
func (d *Duration) UnmarshalJSON(b []byte) error {
	var str string
	err := json.Unmarshal(b, &str)
	if err != nil {
		return err
	}

	pd, err := time.ParseDuration(str)
	if err != nil {
		return err
	}
	d.Duration = pd
	return nil
}

// MarshalJSON implements the json.Marshaler interface.
func (d Duration) MarshalJSON() ([]byte, error) {