anchor.diff:  %% @doc synchronous read_from operation
   -spec read_from({partition(), node()}, log_id(), op_id()) -> term().
   read_from(Node, LogId, From) ->
  -    rial_core_vnode_master:sync_command(Node,
  +    riak_core_vnode_master:sync_command(Node,
                                           {read_from, LogId, From},
                                           ?LOGGING_MASTER).
   
  
positive.code: %% @doc synchronous append operation
  -spec append({partition(), node()}, log_id(), op()) -> term().
  append(Node, LogId, Payload) ->
      rial_core_vnode_master:sync_command(Node,
                                          {append, LogId, Payload},
                                          ?LOGGING_MASTER).
  
  
negative.code:         {error, Reason} ->
              {error, Reason};
          Map ->
              {ok, #state{partition=Partition, logs_map=Map, clock=0}}
      end.
  
  %% @doc Read command: Returns the operations logged for Key
  