CountingSupplier countingCopy =
        (CountingSupplier) ((Suppliers.ExpiringMemoizingSupplier<Integer>) copy).delegate;
    checkExpiration(countingCopy, copy);
  }

  @J2ktIncompatible
  @GwtIncompatible // Thread.sleep
  private void checkExpiration(
      CountingSupplier countingSupplier, Supplier<Integer> memoizedSupplier)
      throws InterruptedException {

            .expireAfterAccess(EXPIRING_TIME, MILLISECONDS)
            .removalListener(removalListener)
            .ticker(ticker)
            .build(loader);
    checkExpiration(cache, loader, ticker, removalListener);
  }

  private void checkExpiration(
      LoadingCache<String, Integer> cache,
      WatchedCreatorLoader loader,
      FakeTicker ticker,
      CountingRemovalListener<String, Integer> removalListener) {