.withFeatures(
                CollectionSize.ANY,
                CollectionFeature.KNOWN_ORDER,
                CollectionFeature.ALLOWS_NULL_QUERIES)
            .named("Multisets.unmodifiableMultiset[TreeMultiset]")
            .createTestSuite());

    suite.addTest(
        MultisetTestSuiteBuilder.using(unionGenerator())

            .withFeatures(
                CollectionSize.ONE,
                CollectionFeature.KNOWN_ORDER,
                CollectionFeature.ALLOWS_NULL_QUERIES)
            .createTestSuite());

    suite.addTest(
        ListTestSuiteBuilder.using(new ImmutableSetAsListGenerator())
            .named("ImmutableSet.asList")
            .withFeatures(
                CollectionSize.ANY,

    SortedMultisetTestSuiteBuilder<E> result = new SortedMultisetTestSuiteBuilder<>();
    result.usingGenerator(generator);
    return result;
  }

  @Override
  public TestSuite createTestSuite() {
    withFeatures(KNOWN_ORDER);
    TestSuite suite = super.createTestSuite();
    for (TestSuite subSuite : createDerivedSuites(this)) {
      suite.addTest(subSuite);
    }
    return suite;
  }

            .withFeatures(
                CollectionSize.ANY,
                CollectionFeature.KNOWN_ORDER,
                CollectionFeature.ALLOWS_NULL_QUERIES)
            .createTestSuite());

    suite.addTest(
        SetTestSuiteBuilder.using(new DegeneratedImmutableSetGenerator())
            .named(ImmutableSetTest.class.getName() + ", degenerate")
            .withFeatures(

                unfiltered.add("zzz");
                return Collections2.filter(unfiltered, NOT_YYY_ZZZ);
              }
            })
        .named("Collections2.filter")
        .withFeatures(
            CollectionFeature.SUPPORTS_ADD,
            CollectionFeature.SUPPORTS_REMOVE,
            CollectionFeature.ALLOWS_NULL_VALUES,
            CollectionFeature.KNOWN_ORDER,
            CollectionSize.ANY)

   * called more than once to add features in multiple groups.
   */
  @CanIgnoreReturnValue
  public B withFeatures(Feature<?>... features) {
    return withFeatures(asList(features));
  }

  @CanIgnoreReturnValue
  public B withFeatures(Iterable<? extends Feature<?>> features) {
    for (Feature<?> feature : features) {
      this.features.add(feature);
    }
    return self();

                    return new ArrayList<>(Sets.newTreeSet(insertionOrder));
                  }
                })
            .named("ForwardingNavigableSet[SafeTreeSet] with standard implementations")
            .withFeatures(
                CollectionSize.ANY,
                CollectionFeature.KNOWN_ORDER,
                CollectionFeature.GENERAL_PURPOSE)
            .createTestSuite());
    suite.addTest(

                      map.put(entry.getKey(), entry.getValue());
                    }
                    return map;
                  }
                })
            .withFeatures(
                CollectionSize.ANY,
                CollectionFeature.KNOWN_ORDER,
                CollectionFeature.SERIALIZABLE,
                MapFeature.ALLOWS_NULL_VALUES,

                      map.put(entry.getKey(), entry.getValue());
                    }
                    return map;
                  }
                })
            .withFeatures(
                CollectionSize.ANY,
                CollectionFeature.KNOWN_ORDER,
                CollectionFeature.SERIALIZABLE,
                MapFeature.ALLOWS_NULL_VALUES,

                  public List<String> order(List<String> insertionOrder) {
                    return new ArrayList<>(Sets.newTreeSet(insertionOrder));
                  }
                })
            .withFeatures(
                CollectionSize.ANY,
                CollectionFeature.KNOWN_ORDER,
                CollectionFeature.GENERAL_PURPOSE)
            .named("SafeTreeSet with natural comparator")