return false;
    }
  }

  // Queues

  /**
   * A custom queue for managing eviction order. Note that this is tightly integrated with {@code
   * ReferenceEntry}, upon which it relies to perform its linking.
   *
   * <p>Note that this entire implementation makes the assumption that all elements which are in the
   * map are also in this queue, and that all elements not in the queue are not in the map.

    future1.addListener(
        new Runnable() {
          @Override
          public void run() {
            assertTrue(future1.isCancelled());
            /*
             * This test relies on behavior that's unspecified but currently
             * guaranteed by the implementation: Cancellation of inputs is
             * performed in the order they were provided to the constructor. Verify

    future1.addListener(
        new Runnable() {
          @Override
          public void run() {
            assertTrue(future1.isCancelled());
            /*
             * This test relies on behavior that's unspecified but currently
             * guaranteed by the implementation: Cancellation of inputs is
             * performed in the order they were provided to the constructor. Verify

      return this;
    }
  }

  // Queues

  /**
   * A custom queue for managing eviction order. Note that this is tightly integrated with {@code
   * ReferenceEntry}, upon which it relies to perform its linking.
   *
   * <p>Note that this entire implementation makes the assumption that all elements which are in the
   * map are also in this queue, and that all elements not in the queue are not in the map.