@Override
    public long getUnsignedInt(int index) {
        return getInt(index) & 0xFFFFFFFFL;
    }
@Test
    public void testGetUnsignedIntAfterRelease() {
        assertThrows(IllegalReferenceCountException.class, new Executable() {
            @Override
            public void execute() {
                releasedBuffer().getUnsignedInt(0);
            }
        });
    }