code: func New(cfg Collector, nodeInfo collectors.NodeInfo) (Collector, chan producers.MetricsMessage) {
  	c := Collector{
  		PollPeriod:  cfg.PollPeriod,
  		MetricsChan: make(chan producers.MetricsMessage),
  		log:         log.WithFields(log.Fields{"collector": "node"}),
  		nodeInfo:    nodeInfo,
  	}
  	return c, c.MetricsChan
  }
docs: // New returns a new instance of the node metrics collector and a metrics chan.