private void testHasMapEntriesInOrder(Map<?, ?> map, Object... alternatingKeysAndValues) {
    List<? extends Entry<?, ?>> entries = new ArrayList<>(map.entrySet());
    List<Object> keys = new ArrayList<>(map.keySet());
    List<Object> values = new ArrayList<>(map.values());
    assertThat(alternatingKeysAndValues).hasLength(2 * entries.size());
    assertThat(alternatingKeysAndValues).hasLength(2 * keys.size());

  private void testHasMapEntriesInOrder(Map<?, ?> map, Object... alternatingKeysAndValues) {
    List<? extends Entry<?, ?>> entries = new ArrayList<>(map.entrySet());
    List<Object> keys = new ArrayList<>(map.keySet());
    List<Object> values = new ArrayList<>(map.values());
    assertThat(alternatingKeysAndValues).hasLength(2 * entries.size());
    assertThat(alternatingKeysAndValues).hasLength(2 * keys.size());

    this.keyHashTable = null;
    this.alternatingKeysAndValues = new Object[0];
    this.keyOffset = 0;
    this.size = 0;
    this.inverse = (RegularImmutableBiMap<V, K>) this;
  }

  /** K-to-V constructor. */
  RegularImmutableBiMap(@Nullable Object[] alternatingKeysAndValues, int size) {
    this.alternatingKeysAndValues = alternatingKeysAndValues;
    this.size = size;
    this.keyOffset = 0;