anchor.diff:  %% @spec stop() -> any()
   %% @doc stop the rrdtool gen_server
   stop()       -> gen_server:call      (?MODULE, stop).
  +
  +%% @doc calls gen_server:start_link
  +start_link() -> gen_server:start_link({local, ?MODULE}, ?MODULE, [], []).
   
   %% @spec combine(List) -> List
   %%   List = [ term() ]
  
positive.code: %% Gen server interface poo
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  
  %% @hidden
  start_link() -> gen_server:start_link({local, ?MODULE}, ?MODULE, [], []).
  
  %% @hidden
  init(_Args) -> 
  
negative.code: 	 terminate/2, code_change/3]).
  
  -record( state, { port }  ).
  
  %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  %% Public 
  