anchor.diff:  
   -spec unmarshall(map()) -> map().
   unmarshall(Data) when is_map(Data) ->
  -    ?nebMsg("Entry"),
  +%    ?nebMsg("Entry"),
       maps:get(<<"cdmi">>, Data).
   
   %% @doc Update an object.
  
positive.code: 
  -spec marshall(map()) -> map().
  marshall(Data) when is_map(Data) ->
      ?nebMsg("Entry"),
      SearchKey = nebula2_utils:make_search_key(Data),
      marshall(Data, SearchKey).
  
  -spec marshall(map(), binary()) -> map().
  marshall(Data, SearchKey) when is_map(Data), is_binary(SearchKey) ->
      ?nebMsg("Entry"),
      maps:from_list([{<<"cdmi">>, Data}, {<<"sp">>, SearchKey}]).
  
  %% @doc Read an object
  -spec read(pid(), object_oid()) -> {ok, map()}|{error, term()}.
  read(Pid, Oid) when is_pid(Pid), is_binary(Oid) ->
      ?nebMsg("Entry"),
      {ok, Mod} = ?GET_ENV(nebula2, cdmi_metadata_module),
      ?nebFmt("Oid: ~p", [Oid]),
      case nebula2_utils:get_cache(Oid) of
          {ok, Data} ->
              ?nebFmt("Cache Hit: Oid: ~p", [Oid]),
              {ok, Data};
          _ ->
              ?nebFmt("Cache Miss: Oid: ~p", [Oid]),
              case Mod:get(Pid, Oid) of
                  {ok, Data} ->
                      nebula2_utils:set_cache(Data),
  
negative.code: %% @doc Get the domain maps.
  -spec nebula2_db:get_domain_maps(pid()) -> list().
  get_domain_maps(Pid) when is_pid(Pid) ->
  %    ?nebMsg("Entry"),
      Domain = nebula2_utils:get_domain_hash(?SYSTEM_DOMAIN_URI),
      Path = Domain ++ "/system_configuration/"++ "domain_maps",
      {ok, Mod} = ?GET_ENV(nebula2, cdmi_metadata_module),
      case nebula2_utils:get_cache(Path) of
          {ok, Data} ->
              nebula2_utils:get_value(<<"value">>, Data, <<"[]">>);
          _ ->
              case Mod:get_domain_maps(Pid, Path) of
                  {ok, DomainMaps} ->
                      nebula2_utils:set_cache(DomainMaps),
                      D = nebula2_utils:get_value(<<"value">>, DomainMaps, <<"[]">>),
                      D;
                  _ ->
                      <<"[]">>
  