anchor.diff:  
   % EVENTS
   -define (EVENT_MANAGER, event_manager).
  --define (EVENT_HANDLERS, [log_event_handler, app_event_handler, proxy_event_handler, bee_event_handler]).
   -define (NOTIFY (Event), ?EVENT_MANAGER:notify(Event)).
   
   % Port to start on
  
positive.code:   path,
    url,
    concurrency,
    timeout,
    min_instances,
    max_instances,
  
negative.code:   app_name,                 % name of the app this bee supports
    host,
    port,
    routing_param,            % meta data on the bee allows for more granualar abstract parameters
                              % should be a tuple, e.g. {ports: 2}
    start_time,               % starting time
    pid,                      % pid of os port process
    sticky        = false,    % keep this bee around, don't remove it from the bee list if it dies
  