anchor.diff:  % TODO: tests, edoc
   
   
  --export([start_link/0, start/0, stop/0]).
  +-export([start_link/0]).
   % API
   -export([add_piqi/1, convert/5, convert/6, ping/0]).
   % gen_server callbacks
  
positive.code:     {noreply, State}.
  
  
  %% @private user-initiated stop
  handle_cast(stop, State) ->
      % NOTE: linked port receiver will be shut down automatically
      {stop, normal, State}.
  
  
  handle_info(Info, State) ->
  
negative.code:     gen_server:start_link(?MODULE, [], []).
  
  
  %
  % gen_server callbacks
  %
  