Load a couple of plugins.

    $ antigen-bundle $PLUGIN_DIR &> /dev/null
    $ antigen-bundle $PLUGIN_DIR2 &> /dev/null

  
  Create a snapshot file.
  
    $ test -f snapshot-file
    [1]
    $ antigen-snapshot snapshot-file
    $ test -f snapshot-file
  
  See the contents of the snapshot file.
  
    $ cat snapshot-file
    version='1'; created_on='*'; checksum='*'; (glob)

    .{40} .*/test-plugin (re)
    .{40} .*/test-plugin2 (re)
  
  Reset the antigen's bundle record and run cleanup.
  
    $ unset _ANTIGEN_BUNDLE_RECORD
    $ antigen-cleanup --force | grep '^Deleting' | wc -l
    2
  
  Restore from the snapshot.
  
    $ ls dot-antigen/repos | wc -l
    0
    $ antigen-restore snapshot-file
    Restoring from snapshot-file... done.
    Please open a new shell to get the restored changes.
    $ ls dot-antigen/repos | wc -l
    2