anchor.diff:              ok;
           {error, {already_started, _}} ->
               ok
  -    end.+    end.
  
positive.code: ?FORWARD1(escalus_users, delete_users).
  ?FORWARD2(escalus_users, delete_users).
  
  ?FORWARD1(escalus_story, make_everyone_friends).
  ?FORWARD3(escalus_story, story).
  
  
negative.code:          create_users/2,
           delete_users/1,
           delete_users/2,
           get_users/1,
           override/3,
           make_everyone_friends/1,
           story/3,
  