code: func printNICs(tsv bool, nics ...*crimson.NIC) {
  	if len(nics) > 0 {
  		p := newStdoutPrinter(tsv)
  		defer p.Flush()
  		if !tsv {
  			p.Row("Name", "Machine", "MAC Address", "Switch", "Port")
  		}
  		for _, n := range nics {
  			p.Row(n.Name, n.Machine, n.MacAddress, n.Switch, n.Switchport)
  		}
  	}
  }
docs: // printNICs prints network interface data to stdout in tab-separated columns.