}

    @Override
    public K belowSamplesGreater() {
      return delegate.belowSamplesGreater().getKey();
    }

    @Override
    public K aboveSamplesLesser() {
      return delegate.aboveSamplesLesser().getKey();
    }

    @Override
    public K aboveSamplesGreater() {
      return delegate.aboveSamplesGreater().getKey();
    }
  }

                    return mapEntry("-- b", (Collection<String>) ImmutableSortedSet.of("--below"));
                  }

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

                  @Override