anchor.diff:  
   %% @private
   myself() ->
  -    partisan_peer_service_manager:myself().
  +    partisan_peer_service_manager:myself().
positive.code:     {ok, MembershipList, OutgoingMessages, State}.
  
  %% @doc Leave a node from the cluster.
  leave(State, _Node) ->
      MembershipList = membership_list(State),
      OutgoingMessages = [],
      {ok, MembershipList, OutgoingMessages, State}.
  
  %% @doc Periodic protocol maintenance.
  
negative.code:     {ok, MembershipList, OutgoingMessages, State}.
  
  %% @doc Handling incoming protocol message.
  handle_message(#scamp_v1{membership=Membership0}=State0, {remove_subscription, Node}) ->
      lager:info("~p: Received remove_subscription for node ~p.", [node(), Node]),
      MembershipList0 = membership_list(State0),
  
      case sets:is_element(Node, Membership0) of 
          true ->
              %% Remove.
              Membership = sets:del_element(Membership0, Node),
  
              %% Gossip removals.
              Message = {remove_subscription, Node},
              OutgoingMessages = lists:map(fun(Peer) -> {Peer, {protocol, Message}} end, MembershipList0),
  
              %% Update state.
              State = State0#scamp_v1{membership=Membership},
              MembershipList = membership_list(State),
  
              {ok, MembershipList, OutgoingMessages, State};
          false ->
              OutgoingMessages = [],
              {ok, MembershipList0, OutgoingMessages, State0}
      end;
  handle_message(#scamp_v1{membership=Membership0}=State0, {forward_subscription, Node}) ->
      lager:info("~p: Received subscription for node ~p.", [node(), Node]),
      MembershipList0 = membership_list(State0),
  