for (Integer i : contents) {
          if (EVEN.apply(i)) {
            expected.add(i);
          }
        }
        new EqualsTester()
            .addEqualityGroup(expected, filter(createUnfiltered(contents), EVEN))
            .testEquals();
      }
    }
  }

  public abstract static class AbstractFilteredSortedSetTest<C extends SortedSet<Integer>>

              return factory.getName()
                  + "("
                  + Joiner.on(", ").useForNull("null").join(factoryArgs)
                  + ")";
            });
    tester.addEqualityGroup(instance, createInstance(factory, equalArgs));
    for (int i = 0; i < params.size(); i++) {
      List<Object> newArgs = new ArrayList<>(args);

    FreshValueGenerator generator = new FreshValueGenerator();
    EqualsTester tester = new EqualsTester();
    for (int i = 0; i < instances; i++) {
      tester.addEqualityGroup(generator.generateFresh(type));
    }
    tester.testEquals();
  }

  private static <T> void assertEqualInstance(Class<T> type, T value) {
    FreshValueGenerator generator = new FreshValueGenerator();

        assertEquals(new HashSet<>(elements), multimap.asMap().entrySet());
      }
    }.test();
  }

  public void testEquals() {
    new EqualsTester()
        .addEqualityGroup(
            LinkedListMultimap.create(), LinkedListMultimap.create(), LinkedListMultimap.create(1))
        .testEquals();
  }

  @GwtIncompatible // reflection
  public void testNulls() throws Exception {

  private static void assertHashStringEquivalence(HashFunction hashFunction, Random random) {
    // Test that only data and data-order is important, not the individual operations.
    new EqualsTester()
        .addEqualityGroup(
            hashFunction.hashUnencodedChars("abc"),
            hashFunction.newHasher().putUnencodedChars("abc").hash(),
            hashFunction.newHasher().putUnencodedChars("ab").putUnencodedChars("c").hash(),