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

                CollectionSize.ANY,
                CollectionFeature.SERIALIZABLE,
                CollectionFeature.SUPPORTS_ITERATOR_REMOVE,
                CollectionFeature.KNOWN_ORDER,
                MapFeature.ALLOWS_NULL_KEYS,
                MapFeature.ALLOWS_NULL_VALUES,
                MapFeature.ALLOWS_ANY_NULL_QUERIES,
                MapFeature.GENERAL_PURPOSE)
            .createTestSuite());

  }

  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);
    }

                CollectionSize.ANY,
                CollectionFeature.SERIALIZABLE,
                CollectionFeature.SUPPORTS_ITERATOR_REMOVE,
                CollectionFeature.KNOWN_ORDER,
                MapFeature.ALLOWS_NULL_KEYS,
                MapFeature.ALLOWS_NULL_VALUES,
                MapFeature.ALLOWS_ANY_NULL_QUERIES,
                MapFeature.GENERAL_PURPOSE)
            .createTestSuite());

    // currently, the KeySetGenerator won't work properly for a subset of a keyset of a submap
    keySetFeatures.add(CollectionFeature.SUBSET_VIEW);
    if (mapFeatures.contains(MapFeature.ALLOWS_NULL_KEYS)) {
      keySetFeatures.add(CollectionFeature.ALLOWS_NULL_VALUES);
    } else if (mapFeatures.contains(MapFeature.ALLOWS_NULL_KEY_QUERIES)) {
      keySetFeatures.add(CollectionFeature.ALLOWS_NULL_QUERIES);
    }

                      }
                    }.sortedCopy(insertionOrder);
                  }
                })
            .named("TreeMultimap nullsFirst")
            .withFeatures(
                MapFeature.ALLOWS_NULL_KEYS,
                MapFeature.ALLOWS_NULL_VALUES,
                MapFeature.ALLOWS_ANY_NULL_QUERIES,
                MapFeature.GENERAL_PURPOSE,
                MapFeature.FAILS_FAST_ON_CONCURRENT_MODIFICATION,

                    }
                    return multimap;
                  }
                })
            .named("LinkedListMultimap")
            .withFeatures(
                MapFeature.ALLOWS_NULL_KEYS,
                MapFeature.ALLOWS_NULL_VALUES,
                MapFeature.ALLOWS_ANY_NULL_QUERIES,
                MapFeature.GENERAL_PURPOSE,
                CollectionFeature.SUPPORTS_ITERATOR_REMOVE,