WeakValueReference<Object, Object, ?> otherValueRef =
        segment.newWeakValueReferenceForTesting(entry, value);
    segment.setWeakValueReferenceForTesting(entry, otherValueRef);
    assertFalse(segment.clearValueForTesting(key, hash, valueRef));
    segment.setWeakValueReferenceForTesting(entry, valueRef);
    assertTrue(segment.clearValueForTesting(key, hash, valueRef));
  }

  // reference queues

    WeakValueReference<Object, Object, ?> otherValueRef =
        segment.newWeakValueReferenceForTesting(entry, value);
    segment.setWeakValueReferenceForTesting(entry, otherValueRef);
    assertFalse(segment.clearValueForTesting(key, hash, valueRef));
    segment.setWeakValueReferenceForTesting(entry, valueRef);
    assertTrue(segment.clearValueForTesting(key, hash, valueRef));
  }

  // reference queues

      throw new AssertionError();
    }

    /**
     * Unsafely sets the weak value reference inside the given {@code entry} to be the given {@code
     * valueReference}
     */
    void setWeakValueReferenceForTesting(
        InternalEntry<K, V, ?> entry,
        WeakValueReference<K, V, ? extends InternalEntry<K, V, ?>> valueReference) {
      throw new AssertionError();
    }

    /**