How to use the @svrooij/sonos.SonosEvents.CurrentTrackMetadata function in @svrooij/sonos

function addDevice (device) {
  log.info('Add device %s %s', device.Name, device.host)
  // Start listening for those events!
  device.Events.on(SonosEvents.CurrentTrack, trackUri => {
    publishTrackUri(device, trackUri)
  })
  device.Events.on(SonosEvents.CurrentTrackMetadata, metadata => {
    publishCurrentTrack(device, metadata)
  })
  device.Events.on(SonosEvents.CurrentTransportStateSimple, state => {
    publishState(device, state)
  })
  device.Events.on(SonosEvents.Mute, muted => {
    publishMuted(device, muted)
  })
  device.Events.on(SonosEvents.Volume, volume => {
    publishVolume(device, volume)
  })

  device.Events.on(SonosEvents.GroupName, groupName => {
    publishData(`${config.name}/status/${cleanName(device.Name)}/group`, groupName, cleanName(device.Name), true)
  })

function cancelSubscriptions (device) {
  device.Events.removeAllListeners(SonosEvents.CurrentTrack)
  device.Events.removeAllListeners(SonosEvents.CurrentTrackMetadata)
  device.Events.removeAllListeners(SonosEvents.CurrentTransportState)
  device.Events.removeAllListeners(SonosEvents.Mute)
  device.Events.removeAllListeners(SonosEvents.Volume)
}