&& hashCode() != object.hashCode()) {
      return false;
    }
    return Sets.equalsImpl(this, object);
  }

  @Override
  public int hashCode() {
    return Sets.hashCodeImpl(this);
  }

  // This declaration is needed to make Set.iterator() and
  // ImmutableCollection.iterator() consistent.
  @Override
  public abstract UnmodifiableIterator<E> iterator();

    @Override
    public boolean equals(@Nullable Object object) {
      return Sets.equalsImpl(this, object);
    }

    @Override
    public int hashCode() {
      return Sets.hashCodeImpl(this);
    }
  }

  /**
   * Returns a {@link Converter} that converts values using {@link BiMap#get bimap.get()}, and whose

    @Override
    public boolean equals(@Nullable Object object) {
      return Sets.equalsImpl(this, object);
    }

    @Override
    public int hashCode() {
      return Sets.hashCodeImpl(this);
    }
  }

  /**
   * Returns a {@link Converter} that converts values using {@link BiMap#get bimap.get()}, and whose