return loader.loadAll(keys);
      }
    };
  }

  private static final class SupplierToCacheLoader<V> extends CacheLoader<Object, V>
      implements Serializable {
    private final Supplier<V> computingSupplier;

    SupplierToCacheLoader(Supplier<V> computingSupplier) {
      this.computingSupplier = checkNotNull(computingSupplier);
    }

    @Override