return wrap((Table<?, ?, ?>) delegate);
              }
            });
  }

  public void testEquals() {
    Table<Integer, Integer, String> table1 = ImmutableTable.of(1, 1, "one");
    Table<Integer, Integer, String> table2 = ImmutableTable.of(2, 2, "two");
    new EqualsTester()
        .addEqualityGroup(table1, wrap(table1), wrap(table1))
        .addEqualityGroup(table2, wrap(table2))

    assertTrue(okSource.wasStreamClosed());
  }

  public void testConcat() throws IOException {
    ByteSource b1 = ByteSource.wrap(new byte[] {0, 1, 2, 3});
    ByteSource b2 = ByteSource.wrap(new byte[0]);
    ByteSource b3 = ByteSource.wrap(new byte[] {4, 5});

    byte[] expected = {0, 1, 2, 3, 4, 5};

    assertArrayEquals(expected, ByteSource.concat(ImmutableList.of(b1, b2, b3)).read());

                return wrap(delegate);
              }
            });
  }

  public void testEquals() {
    List<String> list1 = ImmutableList.of("one");
    List<String> list2 = ImmutableList.of("two");
    new EqualsTester()
        .addEqualityGroup(list1, wrap(list1), wrap(list1))
        .addEqualityGroup(list2, wrap(list2))
        .testEquals();
  }

                return wrap(delegate);
              }
            });
  }

  public void testEquals() {
    SortedMultiset<String> set1 = ImmutableSortedMultiset.of("one");
    SortedMultiset<String> set2 = ImmutableSortedMultiset.of("two");
    new EqualsTester()
        .addEqualityGroup(set1, wrap(set1), wrap(set1))
        .addEqualityGroup(set2, wrap(set2))
        .testEquals();
  }

                return wrap(delegate);
              }
            });
  }

  public void testEquals() {
    NavigableSet<String> set1 = ImmutableSortedSet.of("one");
    NavigableSet<String> set2 = ImmutableSortedSet.of("two");
    new EqualsTester()
        .addEqualityGroup(set1, wrap(set1), wrap(set1))
        .addEqualityGroup(set2, wrap(set2))
        .testEquals();
  }

                return wrap((ListMultimap<?, ?>) delegate);
              }
            });
  }

  public void testEquals() {
    ListMultimap<Integer, String> map1 = ImmutableListMultimap.of(1, "one");
    ListMultimap<Integer, String> map2 = ImmutableListMultimap.of(2, "two");
    new EqualsTester()
        .addEqualityGroup(map1, wrap(map1), wrap(map1))
        .addEqualityGroup(map2, wrap(map2))

    new EqualsTester()
        .addEqualityGroup(map1, wrap(map1), wrap(map1))
        .addEqualityGroup(map2, wrap(map2))
        .testEquals();
  }

  private static <K, V> SortedSetMultimap<K, V> wrap(final SortedSetMultimap<K, V> delegate) {
    return new ForwardingSortedSetMultimap<K, V>() {
      @Override
      protected SortedSetMultimap<K, V> delegate() {

            Queue.class,
            new Function<Queue, Queue>() {
              @Override
              public Queue apply(Queue delegate) {
                return wrap(delegate);
              }
            });
  }

  private static <T> Queue<T> wrap(final Queue<T> delegate) {
    return new ForwardingQueue<T>() {
      @Override
      protected Queue<T> delegate() {
        return delegate;
      }
    };

     */
    runConcurrentlyMutatedTest(elements(), ops(add(1), add(2)), wrap);

    runConcurrentlyMutatedTest(elements(), ops(add(1), nop()), wrap);

    runConcurrentlyMutatedTest(elements(), ops(add(1), remove()), wrap);

    runConcurrentlyMutatedTest(elements(), ops(nop(), add(1)), wrap);

    runConcurrentlyMutatedTest(elements(1), ops(remove(), nop()), wrap);

    runConcurrentlyMutatedTest(elements(1), ops(remove(), add(2)), wrap);

                return wrap(delegate);
              }
            });
  }

  public void testEquals() {
    Multiset<String> set1 = ImmutableMultiset.of("one");
    Multiset<String> set2 = ImmutableMultiset.of("two");
    new EqualsTester()
        .addEqualityGroup(set1, wrap(set1), wrap(set1))
        .addEqualityGroup(set2, wrap(set2))
        .testEquals();
  }