anchor.diff:  %%====================================================================
   start_link() ->
       gen_server:start_link({local, ?MODULE}, ?MODULE, [], []).
  -
  -%% ----
  --spec stop() -> ok.
  -
  -stop() ->
  -    gen_server:cast(?MODULE, stop).
   
   %% ----
   -spec set(Name, Ident, Priority, Options) -> Result when
  
positive.code:     {reply, ok, State}.
  
  %% ----
  handle_cast(stop, State) ->
      {stop, normal, State};
  handle_cast(_Msg, State) ->
      {noreply, State}.
  
  
negative.code: %% API
  -export([
           start_link/0,
           set/1, set/4,
           unset/1,
           loggers/0,
  