if (delegate instanceof NonSerializableMemoizingSupplier
        || delegate instanceof MemoizingSupplier) {
      return delegate;
    }
    return delegate instanceof Serializable
        ? new MemoizingSupplier<T>(delegate)
        : new NonSerializableMemoizingSupplier<T>(delegate);
  }

  @VisibleForTesting
  static class MemoizingSupplier<T extends @Nullable Object> implements Supplier<T>, Serializable {

    if (delegate instanceof NonSerializableMemoizingSupplier
        || delegate instanceof MemoizingSupplier) {
      return delegate;
    }
    return delegate instanceof Serializable
        ? new MemoizingSupplier<T>(delegate)
        : new NonSerializableMemoizingSupplier<T>(delegate);
  }

  @VisibleForTesting
  static class MemoizingSupplier<T extends @Nullable Object> implements Supplier<T>, Serializable {

    Supplier<Integer> copy = reserialize(memoizedSupplier);
    Object unused2 = memoizedSupplier.get();

    CountingSupplier countingCopy =
        (CountingSupplier) ((Suppliers.MemoizingSupplier<Integer>) copy).delegate;
    checkMemoize(countingCopy, copy);
  }

  public void testCompose() {
    Supplier<Integer> fiveSupplier =
        new Supplier<Integer>() {
          @Override

    Supplier<Integer> copy = reserialize(memoizedSupplier);
    Object unused2 = memoizedSupplier.get();

    CountingSupplier countingCopy =
        (CountingSupplier) ((Suppliers.MemoizingSupplier<Integer>) copy).delegate;
    checkMemoize(countingCopy, copy);
  }

  public void testCompose() {
    Supplier<Integer> fiveSupplier =
        new Supplier<Integer>() {
          @Override