/** Returns the platform preferred implementation of a map based on a hash table. */
  static <K extends @Nullable Object, V extends @Nullable Object>
      Map<K, V> newHashMapWithExpectedSize(int expectedSize) {
    return Maps.newHashMapWithExpectedSize(expectedSize);
  }

  /**
   * Returns the platform preferred implementation of an insertion ordered map based on a hash
   * table.
   */

    @SuppressWarnings("unchecked")
    Entry<E>[] entriesArray = entries.toArray((Entry<E>[]) new Entry<?>[0]);
    Map<E, Integer> delegateMap = Maps.newHashMapWithExpectedSize(entriesArray.length);
    long size = 0;
    for (int i = 0; i < entriesArray.length; i++) {
      Entry<E> entry = entriesArray[i];
      int count = entry.getCount();
      size += count;

 */
@GwtCompatible
final class Platform {
  /** Returns the platform preferred implementation of a map based on a hash table. */
  static <K extends @Nullable Object, V extends @Nullable Object>
      Map<K, V> newHashMapWithExpectedSize(int expectedSize) {
    return CompactHashMap.createWithExpectedSize(expectedSize);
  }

  /**
   * Returns the platform preferred implementation of an insertion ordered map based on a hash
   * table.
   */

  }

  private ArrayListMultimap() {
    this(12, DEFAULT_VALUES_PER_KEY);
  }

  private ArrayListMultimap(int expectedKeys, int expectedValuesPerKey) {
    super(Platform.newHashMapWithExpectedSize(expectedKeys));
    checkNonnegative(expectedValuesPerKey, "expectedValuesPerKey");
    this.expectedValuesPerKey = expectedValuesPerKey;
  }

  /** Returns an empty mutable map whose keys will respect this {@link ElementOrder}. */
  <K extends T, V> Map<K, V> createMap(int expectedSize) {
    switch (type) {
      case UNORDERED:
        return Maps.newHashMapWithExpectedSize(expectedSize);
      case INSERTION:
      case STABLE:
        return Maps.newLinkedHashMapWithExpectedSize(expectedSize);
      case SORTED:
        return Maps.newTreeMap(comparator());
    }

  /** Returns an empty mutable map whose keys will respect this {@link ElementOrder}. */
  <K extends T, V> Map<K, V> createMap(int expectedSize) {
    switch (type) {
      case UNORDERED:
        return Maps.newHashMapWithExpectedSize(expectedSize);
      case INSERTION:
      case STABLE:
        return Maps.newLinkedHashMapWithExpectedSize(expectedSize);
      case SORTED:
        return Maps.newTreeMap(comparator());
    }

    // after  jdk7u40: creates empty table
    assertThat(bucketsOf(Maps.newHashMapWithExpectedSize(0))).isAtMost(1);

    for (int size = 1; size < 200; size++) {
      assertWontGrow(
          size,
          new HashMap<>(),
          Maps.newHashMapWithExpectedSize(size),
          Maps.newHashMapWithExpectedSize(size));
    }
  }

  /** Same test as above but for newLinkedHashMapWithExpectedSize */

    return new LinkedListMultimap<>(multimap);
  }

  LinkedListMultimap() {
    this(12);
  }

  private LinkedListMultimap(int expectedKeys) {
    keyToKeyList = Platform.newHashMapWithExpectedSize(expectedKeys);
  }

  private LinkedListMultimap(Multimap<? extends K, ? extends V> multimap) {
    this(multimap.keySet().size());
    putAll(multimap);
  }

  /**

    // after  jdk7u40: creates empty table
    assertThat(bucketsOf(Maps.newHashMapWithExpectedSize(0))).isAtMost(1);

    for (int size = 1; size < 200; size++) {
      assertWontGrow(
          size,
          new HashMap<>(),
          Maps.newHashMapWithExpectedSize(size),
          Maps.newHashMapWithExpectedSize(size));
    }
  }

  /** Same test as above but for newLinkedHashMapWithExpectedSize */

    return new MultimapBuilderWithKeys<@Nullable Object>() {
      @Override
      <K extends @Nullable Object, V extends @Nullable Object> Map<K, Collection<V>> createMap() {
        return Platform.newHashMapWithExpectedSize(expectedKeys);
      }
    };
  }

  /**
   * Uses a hash table to map keys to value collections.
   *
   * <p>The collections returned by {@link Multimap#keySet()}, {@link Multimap#keys()}, and {@link