outgoing.go
func (ow *outgoingSetWebhook) querystring() querystring {
	toReturn := make(map[string]string)

	if ow.URL != "" {
		toReturn["url"] = ow.URL
	}

	return querystring(toReturn)
}
func (ow *outgoingSetWebhook) querystring() querystring {
	toReturn := make(map[string]string)

	if ow.URL != "" {
		toReturn["url"] = ow.URL
	}

	return querystring(toReturn)
}
// querystring implements querystringer to represent the outgoing certificate
// file.