V1 extends @Nullable Object,
        V2 extends @Nullable Object,
        V3 extends @Nullable Object,
        V4 extends @Nullable Object,
        V5 extends @Nullable Object,
        U extends @Nullable Object> {
      /**
       * Applies this function to five inputs, or throws an exception if unable to do so.
       *

        V1 extends @Nullable Object,
        V2 extends @Nullable Object,
        V3 extends @Nullable Object,
        V4 extends @Nullable Object,
        V5 extends @Nullable Object,
        U extends @Nullable Object> {
      /**
       * Applies this function to five inputs, or throws an exception if unable to do so.
       *

      return right;
    }

    @Override
    public boolean equals(@CheckForNull Object object) {
      if (object instanceof MapDifference.ValueDifference) {
        MapDifference.ValueDifference<?> that = (MapDifference.ValueDifference<?>) object;
        return Objects.equal(this.left, that.leftValue())
            && Objects.equal(this.right, that.rightValue());
      }
      return false;
    }

    @Override

      return right;
    }

    @Override
    public boolean equals(@CheckForNull Object object) {
      if (object instanceof MapDifference.ValueDifference) {
        MapDifference.ValueDifference<?> that = (MapDifference.ValueDifference<?>) object;
        return Objects.equal(this.left, that.leftValue())
            && Objects.equal(this.right, that.rightValue());
      }
      return false;
    }

    @Override

        @Override
        public ReferenceEntry<Object, Object> getEntry() {
          return null;
        }

        @Override
        public ValueReference<Object, Object> copyFor(
            ReferenceQueue<Object> queue,
            @CheckForNull Object value,
            ReferenceEntry<Object, Object> entry) {
          return this;
        }

        @Override
        public boolean isLoading() {

    final SettableFuture<Object> toReturn = SettableFuture.create();
    AsyncFunction<Object, Object> function =
        tagged(
            "Called my toString",
            new AsyncFunction<Object, Object>() {
              @Override
              public ListenableFuture<Object> apply(Object input) throws Exception {
                return toReturn;
              }

    final SettableFuture<Object> toReturn = SettableFuture.create();
    AsyncFunction<Object, Object> function =
        tagged(
            "Called my toString",
            new AsyncFunction<Object, Object>() {
              @Override
              public ListenableFuture<Object> apply(Object input) throws Exception {
                return toReturn;
              }

        @Override
        public ReferenceEntry<Object, Object> getEntry() {
          return null;
        }

        @Override
        public ValueReference<Object, Object> copyFor(
            ReferenceQueue<Object> queue,
            @CheckForNull Object value,
            ReferenceEntry<Object, Object> entry) {
          return this;
        }

        @Override
        public boolean isLoading() {