anchor.diff:  command(State) -> 
       %% Cluster maintenance commands.
       ClusterCommands = lists:flatmap(fun(Command) -> 
  -        case ?PERFORM_LEAVES_AND_JOINS of 
  +        case membership_changes_enabled() of 
               true ->
                   [{1, Command}];
               false ->
  
positive.code:         _ ->
              timer:sleep(Delay),
              wait_until_result(Fun, Result, Retry-1, Delay)
      end.
negative.code:             end, Commands),
  
              %% Add a command to resolve all partitions with a heal.
              ResolveCommands = case fault_injection_enabled() of 
                  true ->
                      case rand:uniform(10) rem 2 =:= 0 of 
                          true ->
  