}

  static Set<Feature<?>> computeKeysFeatures(Set<Feature<?>> multimapFeatures) {
    Set<Feature<?>> result = computeDerivedCollectionFeatures(multimapFeatures);
    if (multimapFeatures.contains(MapFeature.ALLOWS_NULL_KEYS)) {
      result.add(CollectionFeature.ALLOWS_NULL_VALUES);
    }
    if (multimapFeatures.contains(MapFeature.ALLOWS_NULL_KEY_QUERIES)) {
      result.add(CollectionFeature.ALLOWS_NULL_QUERIES);
    }

                    }
                    return multimap;
                  }
                })
            .named("LinkedHashMultimap")
            .withFeatures(
                MapFeature.ALLOWS_NULL_KEYS,
                MapFeature.ALLOWS_NULL_VALUES,
                MapFeature.ALLOWS_ANY_NULL_QUERIES,
                MapFeature.GENERAL_PURPOSE,
                MapFeature.FAILS_FAST_ON_CONCURRENT_MODIFICATION,