List<Feature<?>> features = new ArrayList<>(parentBuilder.getFeatures());
    Set<Method> suppressing = new HashSet<>(parentBuilder.getSuppressedTests());
    features.add(CollectionFeature.SUBSET_VIEW);
    if (features.remove(CollectionFeature.ALLOWS_NULL_VALUES)) {
      // the null value might be out of bounds, so we can't always construct a subset with nulls

    List<Feature<?>> features = new ArrayList<>(parentBuilder.getFeatures());
    Set<Method> suppressing = new HashSet<>(parentBuilder.getSuppressedTests());
    features.add(CollectionFeature.SUBSET_VIEW);
    if (features.remove(CollectionFeature.ALLOWS_NULL_VALUES)) {
      // the null value might be out of bounds, so we can't always construct a subset with nulls

              .named(getName() + " reserialized")
              .withFeatures(computeReserializedCollectionFeatures(parentBuilder.getFeatures()))
              .suppressing(parentBuilder.getSuppressedTests())
              .withSetUp(parentBuilder.getSetUp())
              .withTearDown(parentBuilder.getTearDown())
              .createTestSuite());
    }
    return derivedSuites;
  }

    return subSuiteUsing(new DescendingTestMapGenerator<K, V>(delegate))
        .named(parentBuilder.getName() + " descending")
        .withFeatures(features)
        .suppressing(parentBuilder.getSuppressedTests())
        .createTestSuite();
  }

  NavigableMapTestSuiteBuilder<K, V> subSuiteUsing(TestSortedMapGenerator<K, V> generator) {
    return using(generator);
  }

              .named(getName() + " reserialized")
              .withFeatures(computeReserializedCollectionFeatures(parentBuilder.getFeatures()))
              .suppressing(parentBuilder.getSuppressedTests())
              .withSetUp(parentBuilder.getSetUp())
              .withTearDown(parentBuilder.getTearDown())
              .createTestSuite());
    }
    return derivedSuites;
  }

    return newBuilderUsing(delegate, to, from)
        .named(parentBuilder.getName() + " subMap " + from + "-" + to)
        .withFeatures(features)
        .suppressing(parentBuilder.getSuppressedTests())
        .withSetUp(parentBuilder.getSetUp())
        .withTearDown(parentBuilder.getTearDown())
        .createTestSuite();
  }

  /** Like using() but overrideable by NavigableMapTestSuiteBuilder. */

    return subSuiteUsing(new DescendingTestMapGenerator<K, V>(delegate))
        .named(parentBuilder.getName() + " descending")
        .withFeatures(features)
        .suppressing(parentBuilder.getSuppressedTests())
        .createTestSuite();
  }

  NavigableMapTestSuiteBuilder<K, V> subSuiteUsing(TestSortedMapGenerator<K, V> generator) {
    return using(generator);
  }

  }

  @CanIgnoreReturnValue
  public B suppressing(Collection<Method> methods) {
    suppressedTests.addAll(methods);
    return self();
  }

  public Set<Method> getSuppressedTests() {
    return suppressedTests;
  }

  private static final Logger logger =
      Logger.getLogger(FeatureSpecificTestSuiteBuilder.class.getName());

  }

  @CanIgnoreReturnValue
  public B suppressing(Collection<Method> methods) {
    suppressedTests.addAll(methods);
    return self();
  }

  public Set<Method> getSuppressedTests() {
    return suppressedTests;
  }

  private static final Logger logger =
      Logger.getLogger(FeatureSpecificTestSuiteBuilder.class.getName());