anchor.diff:      % unknown request
       {reply, ok, State}.
   
  +handle_cast(stop, State) ->
  +    {stop, normal, State};
   handle_cast(_Msg, State) ->
       {noreply, State}.
   
  
positive.code:     end,
      proplists:get_value(Key, Options, Default).
  
  % XXX process commands through ofs_store
  send(Msg, State) ->
      Conn = State#?STATE.main_connection,
  
negative.code:     % this is an auxiliary connection.
      % XXX spawn connection handler
      {reply, {ok, self()}, State1};
  handle_call({message, _Connection, Message}, _From, State) ->
      % switch sent us a message
      case notify(Message, State) of
          {ok, CallbackState} ->
              {reply, ok, State#?STATE{callback_state = CallbackState}};
          {terminate, Reason} ->
              signal_stop(),
              {reply, {terminate, Reason}, State}
      end;
  handle_call({error, _Connection, _Reason}, _From, State) ->
      % error on the connection
      {reply, ok, State};
  