code: def _aggregations_list_bookmarks(aggregation_types=None,
                                   start_date=None, end_date=None, limit=None):
      
      aggregation_types = (aggregation_types or
                           list(current_stats.enabled_aggregations))
      for a in aggregation_types:
          aggr_cfg = current_stats.aggregations[a]
          aggregator = aggr_cfg.aggregator_class(
              name=aggr_cfg.name, **aggr_cfg.aggregator_config)
          bookmarks = aggregator.list_bookmarks(start_date, end_date, limit)
          click.echo('{}:'.format(a))
          for b in bookmarks:
              click.echo(' - {}'.format(b.date))
docs: List aggregation bookmarks.