private Objects() {}

  /**
   * Determines whether two possibly-null objects are equal. Returns:
   *
   * <ul>
   *   <li>{@code true} if {@code a} and {@code b} are both null.
   *   <li>{@code true} if {@code a} and {@code b} are both non-null and they are equal according to
   *       {@link Object#equals(Object)}.
   *   <li>{@code false} in all other situations.
   * </ul>
   *

  public void testRoundToDouble_twoToThe54PlusOne() {
    double twoToThe54 = Math.pow(2, 54);
    // the representable doubles are 2^54 and 2^54 + 4
    // 2^54+1 is less than halfway between, so HALF_DOWN and HALF_UP will both go down.
    new RoundToDoubleTester(BigDecimal.valueOf((1L << 54) + 1))
        .setExpectation(twoToThe54, DOWN, FLOOR, HALF_DOWN, HALF_UP, HALF_EVEN)
        .setExpectation(Math.nextUp(twoToThe54), CEILING, UP)

     * deal with the cases where rounding towards 0 is wrong, which typically depends on the sign of
     * p / q.
     *
     * signum is 1 if p and q are both nonnegative or both negative, and -1 otherwise.
     */
    int signum = 1 | ((p ^ q) >> (Integer.SIZE - 1));
    boolean increment;
    switch (mode) {
      case UNNECESSARY:
        checkRoundingUnnecessary(rem == 0);

                new File(delegate.getBasedir()),
                (layout != null) ? layout.getClass().getSimpleName() : "legacy");

        /*
         * NOTE: "invoker:install" vs "appassembler:assemble": Both mojos use the artifact installer to put an artifact
         * into a repository. In the first case, the result needs to be a proper local repository that one can use for

    public static final String MAKE_DEPENDENTS_MODE = "make-dependents";

    // make projects that depend on me, and projects that I depend on
    public static final String MAKE_BOTH_MODE = "make-both";

    private List<String> blackList = new ArrayList<>();

    private Map<String, BuildFailure> buildFailuresByProject = new HashMap<>();

/**
 * GWT emulation of {@link SingletonImmutableSet}.
 *
 * @author Hayward Chan
 */
@ElementTypesAreNonnullByDefault
final class SingletonImmutableSet<E> extends ImmutableSet<E> {

  // This reference is used both by the custom field serializer, and by the
  // GWT compiler to infer the elements of the lists that needs to be
  // serialized.
  //
  // Although this reference is non-final, it doesn't change after set creation.

 * #elementSet} contains the distinct elements of the multiset "with duplicates collapsed", and
 * {@link #entrySet} is similar but contains {@link Entry Multiset.Entry} instances, each providing
 * both a distinct element and the count of that element.
 *
 * <p>In addition to these required methods, implementations of {@code Multiset} are expected to

    return Arrays.asList(copy);
  }

  private interface IteratorOperation {
    @Nullable Object execute(Iterator<?> iterator);
  }

  /**
   * Apply this method to both iterators and return normally only if both produce the same response.
   *
   * @see Stimulus#executeAndCompare(ListIterator, Iterator)
   */
  @SuppressWarnings("CatchingUnchecked") // sneaky checked exception

  }

  private boolean runCollectionTests = true;

  /**
   * Specify whether to skip the general collection tests. Call this method when testing a
   * collection that's both a queue and a list, to avoid running the common collection tests twice.
   * By default, collection tests do run.
   */
  @CanIgnoreReturnValue
  public QueueTestSuiteBuilder<E> skipCollectionTests() {

  /**
   * Returns the set of values that are contained in both this set and the other.
   *
   * <p>This method should always be used instead of {@link Sets#intersection} for {@link
   * ContiguousSet} instances.
   */
  public abstract ContiguousSet<C> intersection(ContiguousSet<C> other);

  /**
   * Returns a range, closed on both ends, whose endpoints are the minimum and maximum values