for (int i = WARMUP_MIN; i < WARMUP_MAX; i++) {
        Entry<Object, Object> entry = warmed.get(i - WARMUP_MIN);
        assertTrue(cache.asMap().containsKey(entry.getKey()));
        assertTrue(cache.asMap().containsValue(entry.getValue()));
        // this getUnchecked() call shouldn't be a cache miss; verified below
        assertEquals(entry.getValue(), cache.getUnchecked(entry.getKey()));
      }

  /**
   * Returns {@code true} if the table contains a mapping with the specified value.
   *
   * @param value value to search for
   */
  boolean containsValue(@CompatibleWith("V") @Nullable Object value);

  /**
   * Returns the value corresponding to the given row and column keys, or {@code null} if no such
   * mapping exists.
   *

  }

  @Override
  public boolean isEmpty() {
    return size() == 0;
  }

  @Override
  public boolean containsValue(@Nullable Object value) {
    Map<K, V> delegate = delegateOrNull();
    if (delegate != null) {
      return delegate.containsValue(value);
    }
    for (int i = 0; i < size; i++) {
      if (Objects.equals(value, value(i))) {
        return true;
      }
    }

   * constructed.
   */
  @Override
  public boolean containsRow(@Nullable Object rowKey) {
    return rowKeyToIndex.containsKey(rowKey);
  }

  @Override
  public boolean containsValue(@Nullable Object value) {
    for (@Nullable V[] row : array) {
      for (V element : row) {
        if (Objects.equals(value, element)) {
          return true;
        }
      }
    }

  @Override
  public boolean contains(@Nullable Object rowKey, @Nullable Object columnKey) {
    return get(rowKey, columnKey) != null;
  }

  @Override
  public boolean containsValue(@Nullable Object value) {
    return values().contains(value);
  }

  /**
   * Guaranteed to throw an exception and leave the table unmodified.
   *
   * @throws UnsupportedOperationException always

  boolean containsKey(@CompatibleWith("K") @Nullable Object key);

  /**
   * Returns {@code true} if this multimap contains at least one key-value pair with the value
   * {@code value}.
   */
  boolean containsValue(@CompatibleWith("V") @Nullable Object value);

  /**
   * Returns {@code true} if this multimap contains at least one key-value pair with the key {@code
   * key} and the value {@code value}.
   */

    return head == null;
  }

  @Override
  public boolean containsKey(@Nullable Object key) {
    return keyToKeyList.containsKey(key);
  }

  @Override
  public boolean containsValue(@Nullable Object value) {
    return values().contains(value);
  }

  // Modification Operations

  /**
   * Stores a key-value pair in the multimap.
   *

    return new SuccessorsFunction<Character>() {
      @Override
      public Iterable<? extends Character> successors(Character node) {
        checkArgument(
            graphMap.containsKey(node) || graphMap.containsValue(node),
            "Node %s is not an element of this graph",
            node);
        return Ordering.natural().immutableSortedCopy(graphMap.get(node));
      }
    };
  }

    return new SuccessorsFunction<Character>() {
      @Override
      public Iterable<? extends Character> successors(Character node) {
        checkArgument(
            graphMap.containsKey(node) || graphMap.containsValue(node),
            "Node %s is not an element of this graph",
            node);
        return Ordering.natural().immutableSortedCopy(graphMap.get(node));
      }
    };
  }

  public boolean isEmpty() {
    return size() == 0;
  }

  @Override
  public boolean containsKey(@Nullable Object key) {
    return get(key) != null;
  }

  @Override
  public boolean containsValue(@Nullable Object value) {
    return values().contains(value);
  }

  // Overriding to mark it Nullable
  @Override
  public abstract @Nullable V get(@Nullable Object key);

  /**