return vs;
    }

    @Override
    public Iterable<V> order(List<V> insertionOrder) {
      List<Entry<K, V>> orderedEntries =
          castOrCopyToList(mapGenerator.order(castOrCopyToList(mapGenerator.getSampleElements(5))));
      sort(
          insertionOrder,
          new Comparator<V>() {
            @Override
            public int compare(V left, V right) {

      }

      @Override
      public String toString() {
        return getKey() + "=" + getValue();
      }
    };
  }

  static <E extends @Nullable Object> List<E> castOrCopyToList(Iterable<E> iterable) {
    if (iterable instanceof List) {
      return (List<E>) iterable;
    }
    List<E> list = new ArrayList<>();
    for (E e : iterable) {
      list.add(e);
    }

      }

      @Override
      public String toString() {
        return getKey() + "=" + getValue();
      }
    };
  }

  static <E extends @Nullable Object> List<E> castOrCopyToList(Iterable<E> iterable) {
    if (iterable instanceof List) {
      return (List<E>) iterable;
    }
    List<E> list = new ArrayList<>();
    for (E e : iterable) {
      list.add(e);
    }