code: func (d *Driver) GetMetadata(id string) (map[string]string, error) {
  	m, err := d.DeviceSet.exportDeviceMetadata(id)
  
  	if err != nil {
  		return nil, err
  	}
  
  	metadata := make(map[string]string)
  	metadata["DeviceId"] = strconv.Itoa(m.deviceID)
  	metadata["DeviceSize"] = strconv.FormatUint(m.deviceSize, 10)
  	metadata["DeviceName"] = m.deviceName
  	return metadata, nil
  }
docs: // GetMetadata returns a map of information about the device.