@Override
  public abstract ImmutableMap<R, Map<C, V>> rowMap();

  @Override
  public boolean contains(@CheckForNull Object rowKey, @CheckForNull Object columnKey) {
    return get(rowKey, columnKey) != null;
  }

  @Override
  public boolean containsValue(@CheckForNull Object value) {
    return values().contains(value);
  }

  /**
   * Guaranteed to throw an exception and leave the table unmodified.
   *

  }

  /**
   * Delegates to {@link Collection#contains}. Returns {@code false} if the {@code contains} method
   * throws a {@code ClassCastException} or {@code NullPointerException}.
   */
  static boolean safeContains(Collection<?> collection, @CheckForNull Object object) {
    checkNotNull(collection);
    try {
      return collection.contains(object);
    } catch (ClassCastException | NullPointerException e) {

     * <ul>
     *     <li>System properties (lowest precedence)</li>
     *     <li>Project properties (optional)</li>
     *     <li>User properties (highest precedence)</li>
     * </ul>
     * Note: Project properties contains properties injected from profiles, if applicable. Their precedence is
     * {@code profile > project}, hence active profile property may override project property.
     * <p>

                OverConstrainedVersionException.class, () -> collect(createSet(new Object[] {a.artifact})));
        assertTrue(e.getMessage().contains("[3.2.1-v3235e, 3.3.0-v3346]"), "Versions unordered");
        assertTrue(e.getMessage().contains("Path to dependency:"), "DependencyTrail unresolved");
    }

    private Artifact getArtifact(String id, Set artifacts) {
        for (Object artifact : artifacts) {

        @Override
        public boolean isExistClass(final String className) {
            final String entryName = prefix + toClassFile(ClassUtil.concatName(rootPackage, className));
            return entryNames.contains(entryName);
        }

        @Override
        public void forEach(final ClassHandler handler) {
            final ZipInputStream zis = new ZipInputStream(URLUtil.openStream(zipUrl));
            try {

      shuffledList = shuffledCopy(shuffledList, new Random(5));

      assertEquals(strictlyOrderedList, ordering.sortedCopy(shuffledList));

      if (!strictlyOrderedList.contains(null)) {
        List<@NonNull T> nonNullShuffledList = (List<@NonNull T>) shuffledList;
        assertEquals(strictlyOrderedList, ordering.immutableSortedCopy(nonNullShuffledList));
      }
    }
  }

    }
  }

  /*
   * This following method is a modified version of one found in
   * http://gee.cs.oswego.edu/cgi-bin/viewcvs.cgi/jsr166/src/test/tck/AbstractExecutorServiceTest.java?revision=1.30
   * which contained the following notice:
   *
   * Written by Doug Lea with assistance from members of JCP JSR-166 Expert Group and released to
   * the public domain, as explained at http://creativecommons.org/publicdomain/zero/1.0/
   *

      shuffledList = shuffledCopy(shuffledList, new Random(5));

      assertEquals(strictlyOrderedList, ordering.sortedCopy(shuffledList));

      if (!strictlyOrderedList.contains(null)) {
        List<@NonNull T> nonNullShuffledList = (List<@NonNull T>) shuffledList;
        assertEquals(strictlyOrderedList, ordering.immutableSortedCopy(nonNullShuffledList));
      }
    }
  }

        : Iterators.size(iterable.iterator());
  }

  /**
   * Returns {@code true} if {@code iterable} contains any element {@code o} for which {@code
   * Objects.equals(o, element)} would return {@code true}. Otherwise returns {@code false}, even in
   * cases where {@link Collection#contains} might throw {@link NullPointerException} or {@link
   * ClassCastException}.
   */

    checkNotNull(multiset1);
    checkNotNull(multiset2);

    return new ViewMultiset<E>() {
      @Override
      public boolean contains(@CheckForNull Object element) {
        return multiset1.contains(element) || multiset2.contains(element);
      }

      @Override
      public boolean isEmpty() {
        return multiset1.isEmpty() && multiset2.isEmpty();
      }

      @Override