var types madmin.MetricType = madmin.MetricsDisk | madmin.MetricNet | madmin.MetricsMem | madmin.MetricsCPU

	m := collectLocalMetrics(types, collectMetricsOpts{})
	for _, hm := range m.ByHost {
		if hm.Net != nil && len(hm.Net.NetStats.Name) > 0 {
			stats := hm.Net.NetStats
			labels := map[string]string{"interface": stats.Name}
			updateResourceMetrics(interfaceSubsystem, interfaceRxBytes, float64(stats.RxBytes), labels, true)

		return ErrSignatureDoesNotMatch
	}
	return ErrNone
}

func calculateSignatureV2(stringToSign string, secret string) string {
	hm := hmac.New(sha1.New, []byte(secret))
	hm.Write([]byte(stringToSign))
	return base64.StdEncoding.EncodeToString(hm.Sum(nil))
}

// Return signature-v2 for the presigned request.

	hm := func(ctx HandlerContext, i I) []O {
		res := hf(ctx, i)
		if res == nil {
			return nil
		}
		return []O{*res}
	}
	o := buildCollectionOptions(opts...)
	if o.name == "" {
		o.name = fmt.Sprintf("Collection[%v,%v]", ptr.TypeName[I](), ptr.TypeName[O]())
	}
	return newManyCollection[I, O](c, hm, o)
}

      return empty;
    }
    try {
      return fromEntryArrayCheckingBucketOverflow(n, entryArray, throwIfDuplicateKeys);
    } catch (BucketOverflowException e) {
      // probable hash flooding attack, fall back to j.u.HM based implementation and use its
      // implementation of hash flooding protection
      return JdkBackedImmutableMap.create(n, entryArray, throwIfDuplicateKeys);
    }
  }

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