anchor.diff:  -spec get_results(jobname()) -> invalid_job | {ready, pid(), [job_coordinator:input()]}
                                       | {process_status(), pid()}.
   get_results(JobName) ->
  -    gen_server:call(event_server, {get_results, JobName}).
  +    gen_server:call(?MODULE, {get_results, JobName}).
   
   -spec clean_job(jobname()) -> ok.
   clean_job(JobName) ->
  
positive.code: 
  -spec task_event(task(), term(), tuple(), host()) -> ok.
  task_event(Task, Event, Params, Host) ->
      task_event(Task, Event, Params, Host, event_server).
  
  -spec task_event(task(), term(), tuple(), host(), server()) -> ok.
  task_event(Task, {Type, Message}, Params, Host, EventServer) ->
  
negative.code: 
  -spec event(host(), jobname(), nonempty_string(), list(), tuple()) -> ok.
  event(Host, JobName, Format, Args, Params) ->
      event(?MODULE, Host, JobName, Format, Args, Params).
  
  -spec event(server(), host(), jobname(), nonempty_string(), list(), tuple()) -> ok.
  event(EventServer, Host, JobName, Format, Args, Params) ->
  