}

    @Override
    public void accept(PluginDescriptor pluginDescriptor) {
        String requiredJavaVersion = pluginDescriptor.getRequiredJavaVersion();
        if (requiredJavaVersion != null && !requiredJavaVersion.isEmpty()) {
            String currentJavaVersion = System.getProperty("java.version");
            if (!matchesVersion(requiredJavaVersion, currentJavaVersion)) {

        assertNotNull(project.getRemoteArtifactRepositories());
        assertTrue(project.getRemoteArtifactRepositories().isEmpty());

        assertNotNull(project.getPluginArtifactRepositories());
        assertTrue(project.getPluginArtifactRepositories().isEmpty());

        assertNull(project.getParent());
        assertNull(project.getParentArtifact());

    assertTrue(FluentIterable.<String>from(Collections.<String>emptyList()).isEmpty());
    assertFalse(FluentIterable.<String>from(Lists.newArrayList("foo")).isEmpty());
  }

  public void testToList() {
    assertEquals(Lists.newArrayList(1, 2, 3, 4), fluent(1, 2, 3, 4).toList());
  }

  public void testToList_empty() {
    assertTrue(fluent().toList().isEmpty());
  }

  public void testToSortedList_withComparator() {

        return !isEmpty(collection);
    }

    /**
     * Returns {@literal true} if the given {@link Map} is {@literal null} or empty.
     *
     * @param map the map
     * @return {@literal true} if the map is {@literal null} or empty
     */
    public static boolean isEmpty(final Map<?, ?> map) {
        return map == null || map.isEmpty();
    }

    /**

            path.append(ARTIFACT_SEPARATOR).append(artifact.getClassifier());
        }

        if (artifactHandler.getExtension() != null
                && !artifactHandler.getExtension().isEmpty()) {
            path.append(GROUP_SEPARATOR).append(artifactHandler.getExtension());
        }

        return path.toString();
    }

    @Override

    @Deprecated
    public Map<String, String> getPhases() {
        Map<String, LifecyclePhase> lphases = getLifecyclePhases();
        if (lphases == null) {
            return null;
        }

        if (lphases.isEmpty()) {
            return Collections.emptyMap();
        }

        Map<String, String> phases = new LinkedHashMap<>();
        for (Map.Entry<String, LifecyclePhase> e : lphases.entrySet()) {

                    final Tuple3<String, String, String> task = thumbnailTaskQueue.poll(thumbnailTaskQueueTimeout, TimeUnit.MILLISECONDS);
                    if (task == null) {
                        if (!taskList.isEmpty()) {
                            storeQueue(taskList);
                        }
                    } else if (!taskList.contains(task)) {
                        taskList.add(task);

    assertFalse(multimap.containsValue(1));
    assertFalse(multimap.containsEntry("foo", 1));
    assertTrue(multimap.entries().isEmpty());
    assertTrue(multimap.equals(ArrayListMultimap.create()));
    assertEquals(emptyList(), multimap.get("foo"));
    assertEquals(0, multimap.hashCode());
    assertTrue(multimap.isEmpty());
    assertEquals(HashMultiset.create(), multimap.keys());
    assertEquals(emptySet(), multimap.keySet());

        StringBuilder buff = new StringBuilder();
        if (md.getExecutePhase() != null && !md.getExecutePhase().isEmpty()) {
            // forked phase
            if (md.getExecuteLifecycle() != null && !md.getExecuteLifecycle().isEmpty()) {
                buff.append('[');
                buff.append(md.getExecuteLifecycle());
                buff.append(']');
            }

   */
  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.
   *