}
    }

    @Override
    public Collection<ArtifactMetadata> getMetadataList() {
        if (metadataMap == null) {
            return Collections.emptyList();
        }

        return Collections.unmodifiableCollection(metadataMap.values());
    }

    // ----------------------------------------------------------------------
    // Object overrides

  }

  // `primitives` can't depend on `collect`, so this is what the prod code has to return.
  @SuppressWarnings("EmptyList")
  public void testAsListEmpty() {
    assertThat(Doubles.asList(EMPTY)).isSameInstanceAs(Collections.emptyList());
  }

  /**
   * A reference implementation for {@code tryParse} that just catches the exception from {@link
   * Double#valueOf}.
   */

   * @param backingArray the array to back the list
   * @return a list view of the array
   */
  public static List<Character> asList(char... backingArray) {
    if (backingArray.length == 0) {
      return Collections.emptyList();
    }
    return new CharArrayAsList(backingArray);
  }

  private static final class CharArrayAsList extends AbstractList<Character>
      implements RandomAccess, Serializable {
    final char[] array;

   * @param backingArray the array to back the list
   * @return a list view of the array
   */
  public static List<Short> asList(short... backingArray) {
    if (backingArray.length == 0) {
      return Collections.emptyList();
    }
    return new ShortArrayAsList(backingArray);
  }

  private static final class ShortArrayAsList extends AbstractList<Short>
      implements RandomAccess, Serializable {
    final short[] array;

  }

  // `primitives` can't depend on `collect`, so this is what the prod code has to return.
  @SuppressWarnings("EmptyList")
  public void testAsListEmpty() {
    assertThat(Ints.asList(EMPTY)).isSameInstanceAs(Collections.emptyList());
  }

  @J2ktIncompatible
  @GwtIncompatible // NullPointerTester
  public void testNulls() {

   * @param backingArray the array to back the list
   * @return a list view of the array
   */
  public static List<Short> asList(short... backingArray) {
    if (backingArray.length == 0) {
      return Collections.emptyList();
    }
    return new ShortArrayAsList(backingArray);
  }

  private static final class ShortArrayAsList extends AbstractList<Short>
      implements RandomAccess, Serializable {
    final short[] array;

        List<MavenProject> modules = requestPomProject.getCollectedProjects() != null
                ? requestPomProject.getCollectedProjects()
                : Collections.emptyList();

        List<MavenProject> result = new ArrayList<>(modules);
        result.add(requestPomProject);
        return result;
    }

    private String formatProjects(List<MavenProject> projects) {

        String excludes = ConfigUtils.getString(session, null, Constants.MAVEN_PLUGIN_VALIDATION_EXCLUDES);
        if (excludes == null || excludes.isEmpty()) {
            return Collections.emptyList();
        }
        return Arrays.stream(excludes.split(","))
                .map(String::trim)
                .filter(s -> !s.isEmpty())
                .collect(Collectors.toList());
    }

                .collect(Collectors.toList()));
        this.setId(original.getId());
        this.setIsolatedRealm(original.isIsolatedRealm());
        this.setSource(null);
        this.setDependencies(Collections.emptyList()); // TODO: v4
        this.setDependencyNode(null); // TODO: v4
        this.pluginDescriptorV4 = original;
    }

    // ----------------------------------------------------------------------
    //

   * @since 14.0
   */
  @SuppressWarnings("EmptyList") // ImmutableList doesn't support nullable element types
  public <E extends T> List<E> leastOf(Iterator<E> iterator, int k) {
    checkNotNull(iterator);
    checkNonnegative(k, "k");

    if (k == 0 || !iterator.hasNext()) {
      return emptyList();
    } else if (k >= Integer.MAX_VALUE / 2) {