code: func RequestDevStatus(ds *storage.DeviceSession) storage.MACCommandBlock {
  	block := storage.MACCommandBlock{
  		CID: lorawan.DevStatusReq,
  		MACCommands: []lorawan.MACCommand{
  			{
  				CID: lorawan.DevStatusReq,
  			},
  		},
  	}
  	ds.LastDevStatusRequested = time.Now()
  	log.WithFields(log.Fields{
  		"dev_eui": ds.DevEUI,
  	}).Info("requesting device-status")
  	return block
  }
docs: // RequestDevStatus returns a mac-command block for requesting the device-status.