super(1, 0, 2, 3, 4);
    }
  }

  public static <K extends @Nullable Object, V extends @Nullable Object>
      SampleElements<Entry<K, V>> mapEntries(SampleElements<K> keys, SampleElements<V> values) {
    return new SampleElements<>(
        Helpers.mapEntry(keys.e0(), values.e0()),
        Helpers.mapEntry(keys.e1(), values.e1()),

      super(1, 0, 2, 3, 4);
    }
  }

  public static <K extends @Nullable Object, V extends @Nullable Object>
      SampleElements<Entry<K, V>> mapEntries(SampleElements<K> keys, SampleElements<V> values) {
    return new SampleElements<>(
        Helpers.mapEntry(keys.e0(), values.e0()),
        Helpers.mapEntry(keys.e1(), values.e1()),

    this.keys = keys;
    this.values = values;
  }

  @Override
  public SampleElements<Entry<K, V>> samples() {
    return SampleElements.mapEntries(keys, values);
  }

  @Override
  public Set<Entry<K, V>> create(Object... elements) {
    Entry<K, V>[] entries = createArray(elements.length);
    System.arraycopy(elements, 0, entries, 0, elements.length);

    this.keys = keys;
    this.values = values;
  }

  @Override
  public SampleElements<Entry<K, V>> samples() {
    return SampleElements.mapEntries(keys, values);
  }

  @Override
  public Set<Entry<K, V>> create(Object... elements) {
    Entry<K, V>[] entries = createArray(elements.length);
    System.arraycopy(elements, 0, entries, 0, elements.length);