assertThrows(IllegalArgumentException.class, () -> resetMap(entries));
  }

  @MapFeature.Require(REJECTS_DUPLICATES_AT_CREATION)
  @CollectionSize.Require(absent = {ZERO, ONE})
  public void testCreateWithDuplicates_nonNullDuplicatesRejected() {
    Entry<K, V>[] entries = getEntriesMultipleNonNullKeys();
    assertThrows(IllegalArgumentException.class, () -> resetMap(entries));
  }

    assertThrows(IllegalArgumentException.class, () -> resetMap(entries));
  }

  @MapFeature.Require(REJECTS_DUPLICATES_AT_CREATION)
  @CollectionSize.Require(absent = {ZERO, ONE})
  public void testCreateWithDuplicates_nonNullDuplicatesRejected() {
    Entry<K, V>[] entries = getEntriesMultipleNonNullKeys();
    assertThrows(IllegalArgumentException.class, () -> resetMap(entries));
  }

  @SuppressWarnings("unchecked") // Needed to stop Eclipse whining
  private void resetWithHole() {
    Entry<K, V>[] entries = (Entry<K, V>[]) new Entry<?, ?>[] {a, c};
    super.resetMap(entries);
    navigableMap = (NavigableMap<K, V>) getMap();
  }

  @CollectionSize.Require(ZERO)
  public void testEmptyMapFirst() {
    assertNull(navigableMap.firstEntry());
  }