anchor.diff:  %%%===================================================================
   %%% API
   %%%===================================================================
  +-spec(get() -> {ok, [Rec :: #device{}]} | {error, string()}).
  +get() ->
  +  gen_server:call(?SERVER, {get}).
   
   %%--------------------------------------------------------------------
   %% @doc
  
positive.code:   {noreply, NewState :: #state{}, timeout() | hibernate} |
    {stop, Reason :: term(), Reply :: term(), NewState :: #state{}} |
    {stop, Reason :: term(), NewState :: #state{}}).
  handle_call(_Request, _From, State) ->
    {reply, ok, State}.
  
  
negative.code: 
  -behaviour(gen_server).
  
  
  -include("em_records.hrl").
  
  -include_lib("stdlib/include/ms_transform.hrl").
  
  
  %% API
  -export([start_link/0]).
  
  -export([
    get/0
  ]).
  
  %% gen_server callbacks
  -export([init/1,
  