/** Constructs a new empty instance of {@code CompactHashSet}. */
  CompactHashSet() {
    init(CompactHashing.DEFAULT_SIZE);
  }

  /**
   * Constructs a new instance of {@code CompactHashSet} with the specified capacity.
   *
   * @param expectedSize the initial capacity of this {@code CompactHashSet}.
   */
  CompactHashSet(int expectedSize) {
    init(expectedSize);
  }

                    return set;
                  }
                })
            .named("CompactHashSet#TrimToSize")
            .withFeatures(allFeatures)
            .createTestSuite());
    return suite;
  }

  public void testAllocArraysDefault() {
    CompactHashSet<Integer> set = CompactHashSet.create();
    assertThat(set.needsAllocArrays()).isTrue();
    assertThat(set.elements).isNull();

    set.add(1);

@GwtIncompatible
@NullUnmarked
public class CompactHashSetFloodingTest extends AbstractHashFloodingTest<Set<Object>> {
  public CompactHashSetFloodingTest() {
    super(
        ImmutableList.of(Construction.setFromElements(CompactHashSet::create)),
        n -> n * log(n),
        ImmutableList.of(QueryOp.SET_CONTAINS));
  }

  }

  /** Returns the platform preferred implementation of a set based on a hash table. */
  static <E extends @Nullable Object> Set<E> newHashSetWithExpectedSize(int expectedSize) {
    return CompactHashSet.createWithExpectedSize(expectedSize);
  }

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

   * Returns the platform preferred set implementation that preserves insertion order when used only
   * for insertions.
   */
  static <E extends @Nullable Object> Set<E> preservesInsertionOrderOnAddsSet() {
    return CompactHashSet.create();
  }

  /**
   * Returns a new array of the given length with the same type as a reference array.
   *
   * @param reference any array of the desired type
   * @param length the length of the new array

 * when there is a specific reason to prioritize memory over CPU.
 *
 * @author Louis Wasserman
 */
@GwtIncompatible // not worth using in GWT for now
final class CompactLinkedHashSet<E extends @Nullable Object> extends CompactHashSet<E> {

  /** Creates an empty {@code CompactLinkedHashSet} instance. */
  public static <E extends @Nullable Object> CompactLinkedHashSet<E> create() {
    return new CompactLinkedHashSet<>();
  }

  /**