type FilterRule struct {
	Name  string `xml:"Name"`
	Value string `xml:"Value"`
}

func (filter FilterRule) isEmpty() bool {
	return filter.Name == "" && filter.Value == ""
}

// MarshalXML implements a custom marshaller to support `omitempty` feature.
func (filter FilterRule) MarshalXML(e *xml.Encoder, start xml.StartElement) error {
	if filter.isEmpty() {
		return nil
	}
	type filterRuleWrapper FilterRule

		return err
	}

	oa := Args(so)
	if oa.URL == nil || oa.URL.String() == "" {
		*a = oa
		return nil
	}

	*a = oa
	return nil
}

// Opa - implements opa policy agent calls.
type Opa struct {
	args   Args
	client *http.Client
}

// Enabled returns if opa is enabled.
func Enabled(kvs config.KVS) bool {
	return kvs.Get(URL) != ""
}

		if entry.maxRttMs < rttMs {
			entry.maxRttMs = rttMs
		}
		entry.rttMsSum += rttMs
		entry.successRequestCount++
	} else {
		entry.failedRequestCount++
	}
}

// AuthNPlugin - implements pluggable authentication via webhook.
type AuthNPlugin struct {
	args           Args
	client         *http.Client
	shutdownCtx    context.Context
	serviceMetrics *metrics
}

		return err
	}

	oa := Args(so)
	if oa.URL == nil || oa.URL.String() == "" {
		*a = oa
		return nil
	}

	*a = oa
	return nil
}

// AuthZPlugin - implements opa policy agent calls.
type AuthZPlugin struct {
	args   Args
	client *http.Client
}

// Enabled returns if AuthZPlugin is enabled.
func Enabled(kvs config.KVS) bool {
	return kvs.Get(URL) != ""
}