anchor.diff:  
   -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,
  
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: %%%===================================================================
  %%% API
  %%%===================================================================
  -spec(get() -> {ok, [Rec :: #device{}]} | {error, string()}).
  get() ->
    gen_server:call(?SERVER, {get}).
  
  %%--------------------------------------------------------------------
  %% @doc
  