anchor.diff:      ?LOG_DEBUG(#{
           description => "Received membership_strategy",
           from => From,
  -        membership => ?SET:to_list(Membership1)
  +        membership => partisan_membership_set:to_list(Membership1)
       }),
   
  -    case ?SET:equal(Membership0, Membership1) of
  +    case partisan_membership_set:equal(Membership0, Membership1) of
           true ->
               %% Convergence of gossip at this node.
               MembershipList = membership_list(State0),
  
positive.code: 
  %% @private
  membership_list(#full_v1{membership=Membership}) ->
      ?SET:to_list(Membership).
  
  %% @private
  gossip_messages(State) ->
  
negative.code:     Membership = lists:foldl(
          fun
              (#{name := Name} = N, Acc0) when Name == NameToRemove ->
                  partisan_membership_set:remove(N, Actor, Acc0);
              (_, Acc0) ->
                  Acc0
          end,
  