anchor.diff:  app_node(App, _Candidates = [CandidateNode | Nodes], FailOnBadRPC, Cookie) -> 
       Cookie0 = set_the_cookie(Cookie),
       Result = rpc:call(CandidateNode, application, which_applications, []),
  -    set_the_cookie(Cookie0),
  +    _ = set_the_cookie(Cookie0),
       case Result of
   	{badrpc,Reason} when FailOnBadRPC == true ->
   	    ct:fail({Reason,CandidateNode});
  
positive.code: cast(Node, Module, Function, Args, Cookie) when is_atom(Node) ->
      Cookie0 = set_the_cookie(Cookie),
      true = rpc:cast(Node, Module, Function, Args),
      set_the_cookie(Cookie0),
      ok.
  
  
  
negative.code: call(Node, Module, Function, Args, TimeOut, Cookie) when is_atom(Node) ->
      Cookie0 = set_the_cookie(Cookie),
      Result = rpc:call(Node, Module, Function, Args, TimeOut),
      _ = set_the_cookie(Cookie0),
      Result.    
  
  %%% @spec cast(Node, Module, Function, Args) -> ok
  