anchor.diff:  
   
   %% @doc Retrieve cluster members
  -%%
   -spec(get_cluster_members(ClusterId) ->
                {ok, [#mdc_replication_info{}]} |
                {error, any()} when ClusterId::atom()).
  
positive.code: 
  
  %% @doc Handle a fail process
  %%
  -spec(handle_fail(atom(), list({integer(), string()})) ->
               ok | {error, any()}).
  handle_fail(_, []) ->
  
negative.code: 
  %% @doc Compare a local-metadata with a remote-metadata
  %%      If it's inconsistent, the metadata is put into the queue
  -spec(compare_metadata(ListOfMetadata) ->
               ok when ListOfMetadata::[#?METADATA{}]).
  compare_metadata([]) ->
  