FilteredSet(Set<E> unfiltered, Predicate<? super E> predicate) {
      super(unfiltered, predicate);
    }

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

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

    FilteredSet(Set<E> unfiltered, Predicate<? super E> predicate) {
      super(unfiltered, predicate);
    }

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

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

    Predicate<Entry<K, V>> predicate = Predicates.and(multimap.entryPredicate(), entryPredicate);
    return new FilteredEntrySetMultimap<>(multimap.unfiltered(), predicate);
  }

  static boolean equalsImpl(Multimap<?, ?> multimap, @Nullable Object object) {
    if (object == multimap) {
      return true;
    }
    if (object instanceof Multimap) {
      Multimap<?, ?> that = (Multimap<?, ?>) object;

    Predicate<Entry<K, V>> predicate = Predicates.and(multimap.entryPredicate(), entryPredicate);
    return new FilteredEntrySetMultimap<>(multimap.unfiltered(), predicate);
  }

  static boolean equalsImpl(Multimap<?, ?> multimap, @Nullable Object object) {
    if (object == multimap) {
      return true;
    }
    if (object instanceof Multimap) {
      Multimap<?, ?> that = (Multimap<?, ?>) object;

      }
    }

    @Override
    public boolean equals(@Nullable Object o) {
      if (o == this) {
        return true;
      }
      synchronized (mutex) {
        return Sets.equalsImpl(delegate(), o);
      }
    }

    @Override
    public boolean remove(@Nullable Object o) {
      synchronized (mutex) {
        return Maps.removeEntryImpl(delegate(), o);
      }
    }

      }
    }

    @Override
    public boolean equals(@Nullable Object o) {
      if (o == this) {
        return true;
      }
      synchronized (mutex) {
        return Sets.equalsImpl(delegate(), o);
      }
    }

    @Override
    public boolean remove(@Nullable Object o) {
      synchronized (mutex) {
        return Maps.removeEntryImpl(delegate(), o);
      }
    }