anchor.diff:      State#state{pending=Pending, connections=Connections}.
   
   sync_internal_join(#{name := Name} = Node,
  -              From,
  +              From,      
                 #state{pending=Pending0,
                        sync_joins=SyncJoins0,
                        connections=Connections0,
  
positive.code:                                  internal_join(N, S)
                           end, State1, JoiningNodes),
  
      {reply, ok, State2#state{pending=Pending1}};
  
  handle_call({leave, Node}, From, State0) ->
      %% Perform leave.
  
negative.code:             Open =:= Required;
          _ ->
              false
      end.