code: func (el *ChannelEventListener) RegInternalErrors() *ChannelEventListener {
  	el.InternalError = make(chan error)
  	el.ids = append(el.ids, el.em.RegisterListener(func(data interface{}) {
  		el.InternalError <- data.(error)
  	}, event.EventError))
  	return el
  }
docs: // RegInternalErrors registers this listener to listen for internal account errors.