code: def path(name):
      
      try:
          coll = Collection.query.filter(Collection.name == name).one()
          tr = LeftAligned(
              traverse=CollTraversalPathToRoot(coll.path_to_root().all()))
          click.echo(tr(coll))
      except NoResultFound:
          raise click.UsageError('Collection {0} not found'.format(name))
docs: Print path to root.