static final Set<FinalizableReference> references = newConcurrentHashSet();

    static void register(FbosByteSource referent) {
      references.add(new FinalizableReference(referent));
    }

    final State state;

    FinalizableReference(FbosByteSource referent) {
      super(referent, referenceQueue);
      this.state = referent.state;
    }

    @Override