anchor.diff:  -type tag() :: atom().
   
   -record(state, {actor :: actor(),
  +                myself :: node_spec(),
                   tag :: tag(),
                   pending :: pending(),
                   membership :: membership(),
  
positive.code: 
                      %% Announce to the peer service.
                      partisan_peer_service_events:update(Membership),
  
                      %% Gossip the new membership.
                      do_gossip(OurTag, Membership, Connections),
  
negative.code:     Actor = gen_actor(),
      Membership = maybe_load_state_from_disk(Actor),
      Connections = dict:new(),
      Myself = myself(),
  
      %% Get tag, if set.
      Tag = partisan_config:get(tag, undefined),
  
      {ok, #state{actor=Actor,
                  tag=Tag,
                  myself=Myself,
                  pending=[],
                  membership=Membership,
                  connections=Connections}}.
  