anchor.diff:  set_proc_auditor(ProcAuditor) ->
       gen_server:cast(?MODULE, {set_proc_auditor, ProcAuditor}).
   
  +-spec(update_manager_nodes(list()) -> ok | {error, any()}).
  +update_manager_nodes(Managers) ->
  +    gen_server:cast(?MODULE, {update_manager_nodes, Managers}).
   
   %%--------------------------------------------------------------------
   %% GEN_SERVER CALLBACKS
  
positive.code: 
  handle_cast({set_proc_auditor, ProcAuditor}, State) ->
      {noreply, State#state{proc_auditor = ProcAuditor}};
  
  handle_cast({stop_heartbeat}, State) ->
      State#state{enable=false}.
  
negative.code: -export([start_heartbeat/0,
           stop_heartbeat/0,
           heartbeat/0,
           update_manager_nodes/1,
           set_proc_auditor/1]).
  
  %% gen_server callbacks
  