return err
	}
	var result error
	for _, wh := range webhooks {
		result = multierror.Append(result, client.AdmissionregistrationV1().MutatingWebhookConfigurations().Delete(ctx, wh.Name, metav1.DeleteOptions{})).ErrorOrNil()
	}
	return result
}

// PreviousInstallExists checks whether there is an existing Istio installation. Should be used in installer when deciding
// whether to make an installation the default.

	}
	sm.p90Latency = p90Latency

	p99Latency, err := getLatency(promAPI, wname, wns, duration, 0.99)
	if err != nil {
		me = multierror.Append(me, err)
	}
	sm.p99Latency = p99Latency

	if me.ErrorOrNil() != nil {
		return sm, fmt.Errorf("error retrieving some metrics: %v", me.Error())
	}

	return sm, nil
}