scopesToResolveForCurrentProject = scopesToResolve;
        scopesToCollectForAggregatedProjects = Collections.synchronizedSet(new TreeSet<>());
        scopesToResolveForAggregatedProjects = Collections.synchronizedSet(new TreeSet<>());
    }

    public MavenProject getProject() {
        return project;
    }

    public Collection<String> getScopesToCollectForCurrentProject() {

    // Don't bother testing: Verify is like Preconditions. See the discussion on that class.
  }

  private static final Object IGNORE_ME =
      new Object() {
        @Override
        public String toString() {
          throw new AssertionFailedError();
        }
      };

  private static final String FORMAT = "I ate %s pies.";

  private static void checkMessage(Exception e) {

  static final Absent<Object> INSTANCE = new Absent<>();

  @SuppressWarnings("unchecked") // implementation is "fully variant"
  static <T> Optional<T> withType() {
    return (Optional<T>) INSTANCE;
  }

  private Absent() {}

  @Override
  public boolean isPresent() {
    return false;
  }

  @Override
  public T get() {

        immutableCell(null, null, null);
    assertEquals("(null,null)=null", nullEntry.toString());
  }

  public void testEntryEquals() {
    Cell<String, Integer, Character> entry = immutableCell("foo", 1, 'a');

    new EqualsTester()
        .addEqualityGroup(entry, immutableCell("foo", 1, 'a'))
        .addEqualityGroup(immutableCell("bar", 1, 'a'))
        .addEqualityGroup(immutableCell("foo", 2, 'a'))

    private String version;

    /**
     * Creates a new container for the specified model.
     *
     * @param model The model to wrap, may be {@code null}.
     */
    ModelData(ModelSource source, Model model) {
        this.source = source;
        this.model = model;
    }

    /**
     * Creates a new container for the specified model.
     *

        switch (requestType) {
            case REQUEST_PUT:
                break;
            case REQUEST_GET:
                break;
            default:
                throw new IllegalArgumentException("Illegal request type: " + requestType);
        }

        this.requestType = requestType;
    }

    /**
     * @return Returns the eventType.
     */

    Collection<V> result = values;
    return (result == null) ? values = createValues() : result;
  }

  Collection<V> createValues() {
    return new Values();
  }

  Iterator<V> valuesIterator() {
    return new TransformedIterator<Cell<R, C, V>, V>(cellSet().iterator()) {
      @Override
      @ParametricNullness
      V transform(Cell<R, C, V> cell) {
        return cell.getValue();

 *
 *   @TestSubtype
 *   public List<String> intListIsNotSubtypeOfStringList(List<Integer> intList) {
 *     return notSubtype(intList);
 *   }
 * }
 *
 * public void testMySubtypes() throws Exception {
 *   new MySubtypeTests().testAllDeclarations();
 * }
 * }
 *
 * The calls to {@link #isSubtype} and {@link #notSubtype} tells the framework what assertions need
 * to be made.
 *
 * <p>The declaration methods must be public.

        List<MavenOptions> o = options.stream().filter(Objects::nonNull).toList();
        if (o.isEmpty()) {
            throw new IllegalArgumentException("No options specified (or all were null)");
        } else if (o.size() == 1) {
            return o.get(0);
        } else {
            return new LayeredMavenOptions<>(o);
        }
    }

    protected LayeredMavenOptions(List<O> options) {
        super(options);
    }

  private final ExecutionList executionList = new ExecutionList();

  /**
   * Creates a {@code ListenableFutureTask} that will upon running, execute the given {@code
   * Callable}.
   *
   * @param callable the callable task
   * @since 10.0
   */
  public static <V extends @Nullable Object> ListenableFutureTask<V> create(Callable<V> callable) {
    return new ListenableFutureTask<>(callable);
  }

  /**