* key of {@link #aboveSamplesGreater()}.
   */
  Entry<K, V> aboveSamplesLesser();

  /**
   * Returns an entry with a key greater than the keys of the {@link #samples()} and greater than
   * the key of {@link #aboveSamplesLesser()}.
   */
  Entry<K, V> aboveSamplesGreater();

  }

  @Override
  public Entry<String, String> aboveSamplesLesser() {
    return Helpers.mapEntry("~~ a", "above view");
  }

  @Override
  public Entry<String, String> aboveSamplesGreater() {
    return Helpers.mapEntry("~~ b", "above view");
  }

  @Override
  public Iterable<Entry<String, String>> order(List<Entry<String, String>> insertionOrder) {
    return orderEntriesByKey(insertionOrder);

                        "~~ b", (Collection<String>) ImmutableSortedSet.of("~above"));
                  }

                  @Override
                  public Entry<String, Collection<String>> aboveSamplesGreater() {
                    return Helpers.mapEntry(
                        "~~ c", (Collection<String>) ImmutableSortedSet.of("~above"));
                  }
                })

                        "~~ b", (Collection<String>) ImmutableSortedSet.of("~above"));
                  }

                  @Override
                  public Entry<String, Collection<String>> aboveSamplesGreater() {
                    return Helpers.mapEntry(
                        "~~ c", (Collection<String>) ImmutableSortedSet.of("~above"));
                  }
                })