* </pre>
 *
 * <p>This tests {@code foo.equals(foo)}, {@code foo.equals(null)}, and a few other operations.
 *
 * <p>For more extensive testing, add multiple equality groups. Each group should contain objects
 * that are equal to each other but unequal to the objects in any other group. For example:
 *
 * <pre>
 * new EqualsTester()
 *     .addEqualityGroup(new User("page"), new User("page"))

      } else {
        set.add(e);
      }
    }

    EnumSetAccumulator<E> combine(EnumSetAccumulator<E> other) {
      if (this.set == null) {
        return other;
      } else if (other.set == null) {
        return this;
      } else {
        this.set.addAll(other.set);
        return this;
      }
    }

    ImmutableSet<E> toImmutableSet() {
      if (set == null) {

import static com.google.common.util.concurrent.FuturesGetCheckedInputs.FAILED_FUTURE_OTHER_THROWABLE;
import static com.google.common.util.concurrent.FuturesGetCheckedInputs.FAILED_FUTURE_UNCHECKED_EXCEPTION;
import static com.google.common.util.concurrent.FuturesGetCheckedInputs.OTHER_THROWABLE;
import static com.google.common.util.concurrent.FuturesGetCheckedInputs.RUNTIME_EXCEPTION;

    public boolean equals(@Nullable Object o) {
      if (!(o instanceof ValidTestObject)) {
        return false;
      }
      ValidTestObject other = (ValidTestObject) o;
      if (aspect1 != other.aspect1) {
        return false;
      }
      if (aspect2 != other.aspect2) {
        return false;
      }
      return true;
    }

    @Override
    public int hashCode() {
      int result = 17;

                    Set<String> set = Sets.newHashSet(elements);
                    Set<String> other = Sets.newHashSet("wz", "xq");
                    set.addAll(other);
                    other.add("pq");
                    return Sets.difference(set, other);
                  }
                })
            .named("set - set")
            .withFeatures(

    return new EquivalenceTester<>(equivalence);
  }

  /**
   * Adds a group of objects that are supposed to be equivalent to each other and not equivalent to
   * objects in any other equivalence group added to this tester.
   */
  @CanIgnoreReturnValue
  public EquivalenceTester<T> addEquivalenceGroup(T first, T... rest) {
    addEquivalenceGroup(Lists.asList(first, rest));

 *
 * <p><b>GWT warning:</b> Under GWT, both methods simply returns their input, as proper GWT
 * serialization tests require more setup. This no-op behavior allows test authors to intersperse
 * {@code SerializableTester} calls with other, GWT-compatible tests.
 *
 * @author Mike Bostock
 * @since 10.0
 */
@GwtCompatible // but no-op!
@ElementTypesAreNonnullByDefault
public final class SerializableTester {
  private SerializableTester() {}

    private static long negativeToMaxValue(long value) {
      return (value >= 0) ? value : Long.MAX_VALUE;
    }

    /** Increments all counters by the values in {@code other}. */
    public void incrementBy(StatsCounter other) {
      CacheStats otherStats = other.snapshot();
      hitCount.add(otherStats.hitCount());
      missCount.add(otherStats.missCount());
      loadSuccessCount.add(otherStats.loadSuccessCount());

    @Override
    public int hashCode() {
      return interner.hashCode();
    }

    @Override
    public boolean equals(@CheckForNull Object other) {
      if (other instanceof InternerFunction) {
        InternerFunction<?> that = (InternerFunction<?>) other;
        return interner.equals(that.interner);
      }

      return false;
    }
  }

    }

    @Override
    public boolean equals(@Nullable Object obj) {
      if (obj instanceof Suppression) {
        Suppression other = (Suppression) obj;
        return closeable.equals(other.closeable)
            && thrown.equals(other.thrown)
            && suppressed.equals(other.suppressed);
      }
      return false;
    }

    @Override
    public int hashCode() {