@Override
    Provider providerWithNoValue() {
        return WithSideEffectProvider.of(Providers.notDefined(), Stub(ValueSupplier.SideEffect))
    }

    @Override
    Provider<Integer> providerWithValue(Integer value) {
        return WithSideEffectProvider.of(Providers.of(value), Stub(ValueSupplier.SideEffect))
    }

    @Override
    Class<Integer> type() {

     * This new "fixed" side effect will be executed when the resulting provider produces its values.
     */
    default ProviderInternal<T> withSideEffect(@Nullable SideEffect<? super T> sideEffect) {
        return WithSideEffectProvider.of(this, sideEffect);
    }