Collection<String> c = ImmutableSortedMultiset.of("a");
    assertSame(c, ImmutableSortedMultiset.copyOf(c));
  }

  public void testCopyOf_shortcut_immutableMultiset() {
    Collection<String> c = ImmutableSortedMultiset.of("a", "b", "c");
    assertSame(c, ImmutableSortedMultiset.copyOf(c));
  }

  public void testForEachEntry() {
    ImmutableSortedMultiset<String> multiset =

      }
    },
    ImmutableSortedMultisetImpl {
      @Override
      public <E extends Comparable<E>> SortedMultiset<E> create(Collection<E> contents) {
        return ImmutableSortedMultiset.copyOf(contents);
      }
    };
  }

  enum QueueImpl implements CollectionsImplEnum {
    MinMaxPriorityQueueImpl {
      @Override

      }
    },
    ImmutableSortedMultisetImpl {
      @Override
      public <E extends Comparable<E>> SortedMultiset<E> create(Collection<E> contents) {
        return ImmutableSortedMultiset.copyOf(contents);
      }
    };
  }

  enum QueueImpl implements CollectionsImplEnum {
    MinMaxPriorityQueueImpl {
      @Override

  /*
   * If we make these calls inline inside the lambda inside lines(), we get an Animal Sniffer error,
   * despite the @IgnoreJRERequirement annotation there. For details, see ImmutableSortedMultiset.
   */
  private static void closeUnchecked(Closeable closeable) {
    try {
      closeable.close();
    } catch (IOException e) {
      throw new UncheckedIOException(e);
    }
  }