map.put(entry.getKey(), entry.getValue());
                    }
                    return map;
                  }
                })
            .named("CompactHashMap")
            .withFeatures(
                CollectionSize.ANY,
                MapFeature.GENERAL_PURPOSE,
                MapFeature.ALLOWS_NULL_KEYS,
                MapFeature.ALLOWS_NULL_VALUES,
                CollectionFeature.SERIALIZABLE,

                    return ImmutableMultiset.copyOf(elements);
                  }
                })
            .named("ImmutableMultiset")
            .withFeatures(
                CollectionSize.ANY,
                CollectionFeature.SERIALIZABLE_INCLUDING_VIEWS,
                CollectionFeature.ALLOWS_NULL_QUERIES)
            .createTestSuite());

    suite.addTest(

        featuresList,
        MapFeature.GENERAL_PURPOSE,
        CollectionFeature.SUPPORTS_ITERATOR_REMOVE,
        CollectionSize.ANY);
    return MapTestSuiteBuilder.using(generator)
        .named(name)
        .withFeatures(featuresList)
        .createTestSuite();
  }

  // TODO: consider being null-hostile in these tests

  private static Test testsForHashMapNullKeysForbidden() {
    return wrappedHashMapTests(

          CollectionTestSuiteBuilder.using(
                  new ReserializedCollectionGenerator<E>(parentBuilder.getSubjectGenerator()))
              .named(getName() + " reserialized")
              .withFeatures(computeReserializedCollectionFeatures(parentBuilder.getFeatures()))
              .suppressing(parentBuilder.getSuppressedTests())
              .withSetUp(parentBuilder.getSetUp())

    TestSuite suite = new TestSuite();

    suite.addTest(
        NavigableSetTestSuiteBuilder.using(new ImmutableSortedSetCopyOfGenerator())
            .named(ImmutableSortedSetTest.class.getName())
            .withFeatures(
                CollectionSize.ANY,
                CollectionFeature.KNOWN_ORDER,
                CollectionFeature.SERIALIZABLE,
                CollectionFeature.ALLOWS_NULL_QUERIES)
            .createTestSuite());

                  public String[] createValueArray(int length) {
                    return new String[length];
                  }
                })
            .named("TreeRangeMap.asMapOfRanges")
            .withFeatures(
                CollectionSize.ANY,
                MapFeature.SUPPORTS_REMOVE,
                MapFeature.ALLOWS_ANY_NULL_QUERIES,
                CollectionFeature.KNOWN_ORDER,

          CollectionTestSuiteBuilder.using(
                  new ReserializedCollectionGenerator<E>(parentBuilder.getSubjectGenerator()))
              .named(getName() + " reserialized")
              .withFeatures(computeReserializedCollectionFeatures(parentBuilder.getFeatures()))
              .suppressing(parentBuilder.getSuppressedTests())
              .withSetUp(parentBuilder.getSetUp())

                  }
                })
            .named("ForwardingQueue[LinkedList] with standard implementations")
            .withFeatures(
                CollectionSize.ANY,
                CollectionFeature.ALLOWS_NULL_VALUES,
                CollectionFeature.GENERAL_PURPOSE)
            .createTestSuite());

    return suite;
  }

              @Override
              protected Set<String> create(String[] elements) {
                return MinimalSet.of(elements);
              }
            })
        .named("MinimalSet")
        .withFeatures(
            CollectionFeature.ALLOWS_NULL_VALUES, CollectionFeature.NONE, CollectionSize.ANY)
        .createTestSuite();
  }

                  public List<String> order(List<String> insertionOrder) {
                    return Ordering.natural().sortedCopy(insertionOrder);
                  }
                })
            .withFeatures(
                CollectionSize.ANY,
                CollectionFeature.KNOWN_ORDER,
                CollectionFeature.GENERAL_PURPOSE,
                CollectionFeature.SERIALIZABLE,