code: def get_bot_permissions(calendar_id):
      
      return _process_get_perm_resp(
          get_permissions_url,
          post_bot_resource(get_permissions_url,
                            _create_get_perm_body(calendar_id)),
          TrumbaCalendar.BOT_CAMPUS_CODE,
          calendar_id)
docs: :param calendar_id: an integer representing calendar ID
      :return: a list of sorted trumba.Permission objects
               corresponding to the given campus calendar.
               None if error, [] if not exists
      Return a list of Permission objects representing
      the user permissions of a given Bothell calendar.
      raise DataFailureException or a corresponding TrumbaException
      if the request failed or an error code has been returned.