}

        private static <K extends Comparable<?>, V> ImmutableSortedMap<K, V> union(ImmutableSortedMap<K, V> a, ImmutableSortedMap<K, V> b) {
            if (a.isEmpty()) {
                return b;
            } else if (b.isEmpty()) {
                return a;
            } else {
                return ImmutableSortedMap.<K, V>naturalOrder()
                    .putAll(a)
                    .putAll(b)

            .createTestSuite());

    return suite;
  }

  public void testCreation_noArgs() {
    Multiset<String> multiset = ImmutableMultiset.of();
    assertTrue(multiset.isEmpty());
  }

  public void testCreation_oneElement() {
    Multiset<String> multiset = ImmutableMultiset.of("a");
    assertEquals(HashMultiset.create(asList("a")), multiset);
  }

        if (repo != null) {
            String id = repo.getId();

            if (id == null || id.isEmpty()) {
                throw new InvalidRepositoryException("Repository identifier missing", "");
            }

            String url = repo.getUrl();

            if (url == null || url.isEmpty()) {
                throw new InvalidRepositoryException("URL missing for repository " + id, id);
            }

            }
        });
    }

    private boolean resolveEdges(
        final NodeState node,
        final List<EdgeState> dependencies,
        final Spec<EdgeState> dependencyFilter,
        final boolean recomputeSelectors,
        final ResolveState resolveState
    ) {
        if (dependencies.isEmpty()) {
            return false;
        }

  }

  /**
   * Returns {@code true} if {@code rowKeyList().size == 0} or {@code columnKeyList().size() == 0}.
   */
  @Override
  public boolean isEmpty() {
    return rowList.isEmpty() || columnList.isEmpty();
  }

  /**
   * {@inheritDoc}
   *
   * @throws IllegalArgumentException if {@code rowKey} is not in {@link #rowKeySet()} or {@code

    }

    /**
     *
     */
    @Test
    public void testIsEmpty() {
        assertTrue(StringUtil.isEmpty(null));
        assertTrue(StringUtil.isEmpty(""));
        assertFalse(StringUtil.isEmpty(" "));
    }

    /**
     *
     */
    @Test
    public void testIsNotEmpty() {
        assertFalse(StringUtil.isNotEmpty(null));

            List<File> annotationProcessorPath = spec.getAnnotationProcessorPath();
            if (annotationProcessorPath == null || annotationProcessorPath.isEmpty()) {
                args.add("-proc:none");
            } else {
                args.add("-processorpath");
                args.add(Joiner.on(File.pathSeparator).join(annotationProcessorPath));
            }

            .createTestSuite());

    return suite;
  }

  public void testCreation_noArgs() {
    Multiset<String> multiset = ImmutableSortedMultiset.of();
    assertTrue(multiset.isEmpty());
  }

  public void testCreation_oneElement() {
    Multiset<String> multiset = ImmutableSortedMultiset.of("a");
    assertEquals(HashMultiset.create(asList("a")), multiset);
  }

        .containsExactly("a", "in", "the", "over", "quick", "jumped")
        .inOrder();
    assertTrue(set.subSet("", "b").isEmpty());
    assertTrue(set.subSet("vermont", "california").isEmpty());
    assertTrue(set.subSet("aaa", "zzz").isEmpty());
    try {
      set.subSet("quick", "the");
      fail();
    } catch (IllegalArgumentException expected) {
    }
  }

   */
  public int size() {
    return map.size();
  }

  /** Returns {@code true} if this map contains no key-value mappings. */
  public boolean isEmpty() {
    return map.isEmpty();
  }

  /**
   * Removes all of the mappings from this map. The map will be empty after this call returns.
   *