service/service.go
func Proxy(service *Service, path string, evt *event.Event, requestID string, w http.ResponseWriter, r *http.Request) error {
	endpoint, err := service.getClient("production")
	if err != nil {
		return err
	}
	return endpoint.Proxy(path, evt, requestID, w, r)
}
func Proxy(service *Service, path string, evt *event.Event, requestID string, w http.ResponseWriter, r *http.Request) error {
	endpoint, err := service.getClient("production")
	if err != nil {
		return err
	}
	return endpoint.Proxy(path, evt, requestID, w, r)
}
// Proxy is a proxy between tsuru and the service.
// This method allow customized service methods.