funcrelabel(lsetlabels.Labels,cfg*config.RelabelConfig)labels.Labels{values:=make([]string,0,len(cfg.SourceLabels))for_,ln:=rangecfg.SourceLabels{values=append(values,lset.Get(string(ln)))}val := strings.Join(values, cfg.Separator)lb := labels.NewBuilder(lset)switch cfg.Action{//此处省略...