anchor.diff:  
               amoc_throttle:start(?NODE_CREATION_THROTTLING, NodeCreationRate),
               amoc_throttle:start(?PUBLICATION_THROTTLING, PublicationRate),
  +            start_coordinator(Settings),
               {ok, Settings};
           Error -> Error
       end.
  
positive.code: -define(NODE_CREATION_THROTTLING, node_creation).
  -define(PUBLICATION_THROTTLING, publication).
  
  -define(COORDINATOR_ID, 1).
  -define(COORDINATOR_TIMEOUT, 100000).
  
  -export([init/0, start/2]).
  
  
negative.code: -spec start(amoc_scenario:user_id(), amoc_scenario:state()) -> any().
  start(Id, Settings) ->
      Client = connect_amoc_user(Id, Settings),
      start_user(Client, Settings).
  
  init_metrics() ->
      Counters = [message,
  