code: func (a *HistoricalApi) nodeMetrics(request *restful.Request, response *restful.Response) {
  	key := core.HistoricalKey{
  		ObjectType: core.MetricSetTypeNode,
  		NodeName:   request.PathParameter("node-name"),
  	}
  	a.processMetricRequest(key, request, response)
  }
docs: // nodeMetrics returns a metric timeseries for a metric of the Node entity.