anchor.diff:  eligible_manifest_keys({{ok, ?INDEX_RESULTS{keys=Keys}},
                           _EndTime},
                          true) ->
  -    [Keys];
  +    case Keys of
  +        [] -> [];
  +        _  -> [Keys]
  +    end;
   eligible_manifest_keys({{ok, ?INDEX_RESULTS{keys=Keys}},
                           _EndTime},
                          false) ->
  -    eligible_manifest_key_sets(riak_cs_config:gc_batch_size(), Keys, []);
  +    split_eligible_manifest_keys(riak_cs_config:gc_batch_size(), Keys, []);
   eligible_manifest_keys({{error, Reason}, EndTime}, _) ->
       _ = lager:warning("Error occurred trying to query from time 0 to ~p"
                         "in gc key index. Reason: ~p",
  
positive.code: -export([init/1,
           idle/2,
           idle/3,
           eligible_manifest_key_sets/3,
           fetching_next_batch/2,
           fetching_next_batch/3,
           feeding_workers/2,
  
negative.code: change_state(State) ->
      gen_fsm:sync_send_all_state_event(?SERVER, {change_state, State}).
  
  split_eligible_manifest_keys_test() ->
      ?assertEqual([], eligible_manifest_key_sets(3, [], [])),
      ?assertEqual([[1]], eligible_manifest_key_sets(3, [1], [])),
      ?assertEqual([[1,2,3]], eligible_manifest_key_sets(3, lists:seq(1,3), [])),
  