code: @Override
    public Auction createAuction(String userId,
                                 long durationMs, long startPrice,
                                 String title, String description)
    {
      ResourceManager manager = getResourceManager();
      
      ServiceRef ref = manager.create(userId, durationMs, startPrice, title, description);
          
      Auction auction = ref.as(Auction.class);
      
      Auction copy = new Auction(auction);
                
      return copy;
    }
docs: private ResourceManager _manager;