anchor.diff:  call() ->
       partisan_gen_server:call(?MODULE, call, infinity).
   
  +delayed_reply_call() ->
  +    partisan_gen_server:call(?MODULE, delay_reply_call, infinity).
  +
   cast(ServerRef) ->
       partisan_gen_server:call(?MODULE, {cast, ServerRef}, infinity).
   
  
positive.code:     {ok, #state{}}.
  
  %% @private
  handle_call(call, From, State) ->
      lager:info("Received call message from ~p in the handle_call handler.", [From]),
      {reply, ok, State};
  
negative.code: %% API
  -export([start_link/0,
           call/0,
           cast/1,
           delayed_reply_call/0
          ]).
  
  %% partisan_gen_server callbacks
  