map.put(2, "c");
    map.remove(2);
    testHasMapEntriesInOrder(map, 1, "a", 4, "b", 3, "d");
  }

  public void testTrimToSize() {
    CompactLinkedHashMap<Integer, String> map = CompactLinkedHashMap.createWithExpectedSize(100);
    map.put(1, "a");
    map.put(4, "b");
    map.put(3, "d");
    map.put(2, "c");
    map.trimToSize();
    assertThat(map.entries).hasLength(4);
    assertThat(map.keys).hasLength(4);

    return CompactHashMap.createWithExpectedSize(expectedSize);
  }

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

   */
  public static <E extends @Nullable Object> CompactHashSet<E> create(
      Collection<? extends E> collection) {
    CompactHashSet<E> set = createWithExpectedSize(collection.size());
    set.addAll(collection);
    return set;
  }

  /**
   * Creates a <i>mutable</i> {@code CompactHashSet} instance containing the given elements in
   * unspecified order.
   *

   */
  public static <E extends @Nullable Object> CompactLinkedHashSet<E> create(
      Collection<? extends E> collection) {
    CompactLinkedHashSet<E> set = createWithExpectedSize(collection.size());
    set.addAll(collection);
    return set;
  }

  /**
   * Creates a {@code CompactLinkedHashSet} instance containing the given elements in unspecified
   * order.
   *

    map.put(2, "c");
    map.remove(2);
    testHasMapEntriesInOrder(map, 1, "a", 4, "b", 3, "d");
  }

  public void testTrimToSize() {
    CompactLinkedHashMap<Integer, String> map = CompactLinkedHashMap.createWithExpectedSize(100);
    map.put(1, "a");
    map.put(4, "b");
    map.put(3, "d");
    map.put(2, "c");
    map.trimToSize();
    assertThat(map.entries).hasLength(4);
    assertThat(map.keys).hasLength(4);

   *     expectedSize} elements without resizing
   * @throws IllegalArgumentException if {@code expectedSize} is negative
   */
  static <K extends @Nullable Object> ObjectCountLinkedHashMap<K> createWithExpectedSize(
      int expectedSize) {
    return new ObjectCountLinkedHashMap<K>(expectedSize);
  }

  private static final int ENDPOINT = -2;

  /*

   *     elements without resizing
   * @throws IllegalArgumentException if {@code expectedSize} is negative
   */
  public static <K extends @Nullable Object, V extends @Nullable Object>
      CompactHashMap<K, V> createWithExpectedSize(int expectedSize) {
    return new CompactHashMap<>(expectedSize);
  }

  private static final Object NOT_FOUND = new Object();

  /**

   *     elements without resizing
   * @throws IllegalArgumentException if {@code expectedSize} is negative
   */
  public static <K extends @Nullable Object, V extends @Nullable Object>
      CompactHashMap<K, V> createWithExpectedSize(int expectedSize) {
    return new CompactHashMap<>(expectedSize);
  }

  private static final Object NOT_FOUND = new Object();

  /**