anchor.diff:  
   -include("lasp.hrl").
   
  --export([get_cluster_members/1,
  +-export([runner_node/0,
  +         get_cluster_members/1,
            pmap/2,
            wait_until/3,
            wait_until_left/2,
  
positive.code:          wait_until_connected/2,
           nodelist/0,
           start_node/3,
           start_nodes/2,
           stop_nodes/2,
           stop_runner/0,
  
negative.code: 
  stop_runner() ->
      application:stop(lasp).
  
  join_to(N, RunnerNode) ->
      lager:info("Locating node: ~p", [N]),
      PeerPort = rpc:call(N,
                          partisan_config,
                          get,
                          [peer_port, ?PEER_PORT]),
      ct:pal("Joining node: ~p to ~p at port ~p",
             [N, RunnerNode, PeerPort]),
      ok = rpc:call(RunnerNode,
                    lasp_peer_service,
                    join,
                    [{N, {127, 0, 0, 1}, PeerPort}]).
  