func Publish(channels []string, msg interface{}) error {
	if hubInstance == nil {
		return errorNohub
	}
	log.Debug("publish to %v", channels)
	hubInstance.Publish(channels, msg)
	return nil
}
func Publish(channels []string, msg interface{}) error {
	if hubInstance == nil {
		return errorNohub
	}
	log.Debug("publish to %v", channels)
	hubInstance.Publish(channels, msg)
	return nil
}
func Publish ( channels [ ] string , msg interface { } ) error { if hubInstance == nil { return errorNohub } log . Debug ( " " , channels ) hubInstance . Publish ( channels , msg ) return nil }
// Publish message to given channels.
Publish message to given channels .