anchor.diff:          Manifest ->
               {ok, Manifest}
       end.
  +
  +%% @doc Return a list of all manifests in the
  +%% active state
  +-spec active_manifests(term()) -> [lfs_manifest()].
  +active_manifests(Manifests) ->
  +    IsActive = fun (?MANIFEST{state=State}) -> State == active end,
  +    lists:filter(IsActive, orddict_values(Manifests)).
   
   %% @doc Mark all active manifests
   %% that are not "the most active"
  
positive.code:                     end end,
                      Manifests)
      end.
  
  %% @doc Return the current `pending_delete' manifests
  %% from an orddict of manifests.
  
negative.code: %% export Public API
  -export([new/2,
           active_manifest/1,
           active_manifests/1,
           mark_overwritten/1,
           mark_pending_delete/2,
           mark_scheduled_delete/2,
           pending_delete_manifests/1,
           prune/1,
           prune/2,
  