### Question:
VavrDeckOfCardsAsList { public Map<Suit, ? extends List<Card>> getCardsBySuit() { return this.cardsBySuit; } VavrDeckOfCardsAsList(); List<Card> shuffle(Random random); Tuple2<Set<Card>, ? extends List<Card>> deal(List<Card> stack, int count); List<Set<Card>> shuffleAndDeal(Random random, int hands, int cardsPerHand); List<Set<Card>> dealHands(
            List<Card> shuffled,
            int hands,
            int cardsPerHand); List<Card> diamonds(); List<Card> hearts(); List<Card> spades(); List<Card> clubs(); Map<Suit, Long> countsBySuit(); Map<Rank, Long> countsByRank(); List<Card> getCards(); Map<Suit, ? extends List<Card>> getCardsBySuit();  }### Answer:
@Test public void cardsBySuit() { var jdkCardsBySuit = this.jdkDeck.getCardsBySuit(); var vavrCardsBySuit = this.vavrDeck.getCardsBySuit(); Assert.assertEquals(jdkCardsBySuit.get(Suit.CLUBS), vavrCardsBySuit.get(Suit.CLUBS).get().toJavaList()); }