public String getToken() {
    return token;
  }
Class representing a Google Playlist Token (short-lived) which is from the response of
UpdatePlaylist API and stored in each job's memory (only used in @{GoogleMusicImporter}). This
token is used by Google Music public API to search the playlist easily when inserting playlist
items. This token should be unique within the upstream system from which the data originated. No
particular format is guaranteed.
extensions/data-transfer/portability-data-transfer-google/src/main/java/org/datatransferproject/datatransfer/google/music/GooglePlaylistInsertionToken.java